Beyonce managed to get George Michael — star of the ’80s pop band Wham! — onstage for a duet of her hit “If I Were a Boy” during a show at London’s O2 Arena on Tuesday night.

Organizers of the Stockholm Jazz Festival — one of Sweden’s biggest music events — say hip-hop and R&B singer Lauryn Hill has cancelled all tour dates in Europe this summer for health reasons.This includes shows in Sweden, Greece, the Netherlands, Poland, Germany, Italy, Switzerland, France, and Austria.

Festival spokeswoman Liisa Tolonen says the artist’s agent informed the festival late Tuesday that all performances in Europe by the troubled former Fugees singer have been cancelled.

The tour was going to be a comeback for Lauryn who has kept a low public profile in recent years.

Maxwell has confirmed that he will embark on a 20-city tour of North American this summer to promote his new album, BLACKsummers’night, due in stores on July 7.

The tour will kick off in Grand Rapids, MI June 17 and include stops in Los Angeles, Cleveland, and Tampa, before wrapping July 31 in Miami, Florida.

Here’s the itinerary for Maxwell’s BLACKsummers’night North American Tour:

Wed-Jun-17 Grand Rapids, MI DeVos Performance Hall
Fri-Jun-19 Hammond, IN The Venue/Horseshoe Hammond
Sat-Jun-20 Milwaukee, WI Riverside Theatre
Tue-Jun-23 Seattle, WA Paramount
Wed-Jun-24 Vancouver, BC The Centre
Fri-Jun-26 Las Vegas, NV Pearl
Sun-Jun-28 Los Angeles, CA BET AWARDS
Mon-Jun-29 Phoenix, AZ Dodge
Wed-Jul-1 Austin, TX Bass
Thu-Jul-2 San Antonio, TX Majestic Theater
Sat-Jul-4 New Orleans, LA Essence Festival (Superdome)
Sun-Jul-12 Nashville, TN Ryman Auditorium
Mon-Jul-13 Louisville, KY Palace Theatre
Wed-Jul-15 Columbus, OH Palace Theatre
Thu-Jul-16 Cleveland, OH Allen Theatre
Sat-Jul-18 Pittsburgh, PA Heinz
Sun-Jul-19 Buffalo, NY Sheas PAC
Tue-Jul-21 Albany, NY The Palace
Wed-Jul-22 New Jersey NJPAC
Fri-Jul-24 Atlantic City, NJ Borgata
Sat-Jul-25 Foxwoods Foxwoods
Mon-Jul-27 Norfolk, VA Chrysler Hall
Tue-Jul-28 Savannah, GA Johnny Mercer
Thu-Jul-30 Tampa, FL Ruth Eckerd Hall
Fri-Jul-31 Miami, FL The Knight Center

Jay-Z and Ciara are planning a summer tour that will include stops in Las Vegas, Connecticut, Atlanta, and a handful of other North American cities.

News of the pairing first broke Monday night when Ciara revealed on her Twitter page: “I will say it because the information has been leaked. Me and Jay-Z will be doing a 10-city tour run together! More details coming soon! [sic]”

So far, stops are scheduled for July 3 and 4 at The Pearl at The Palms in Las Vegas, July 10 at Mohegan Sun Arena in Connecticut, and July 12 in Atlanta.

If you want Jay-Z to play at your event, you’d better have some good peanut butter and jelly! The Smoking Gun has obtained a copy of Jay’s rider for a University of Arizona show last April, and the legendary lyricist had a boatload of interesting demands.

Jay pocketed a cool $750,000 for the gig, but he also wanted a late-model black Maybach, a 72 degree dressing room stocked with beer, vodka, tequila, two bottles of $300 champagne, and “Good Quality” PB&J.

What every self-respecting hip-hop fan hoped would be fifteeen minutes in the spotlight, is blossoming into a full-fledged career for “Crank That” hitmaker Soulja Boy Tell’Em. Check out this video of the Atlanta native dishing on his upcoming summer tour in an interview with Good Day L.A.– just as his latest calamity, “Kiss Me Through The Phone,” kisses the top of the Billboard Hot 100.

Soulja Boy Summer 2009 Tour Dates:

Thurs. May 7th – Los Angeles, CA – Tonight Show w Jay Leno
Fri. May 8th – San Diego, CA – KHTS Radio Show
Sat. May 9th – Irvine, CA – Wango Tango @ Verizon Wireless Center
May 11 – New York, NY – Late Night w Jimmy Fallon
May 15 – Nashville, TN – Riverfront Park
May 16 – East Rutherford, NJ – Z100 Radio @ Izod Venue
May 17 – Mansfield, MA – WXKS Radio Show @ Comcast
May 20 – Washington, DC – WPGC Radio Show
May 22 – Montgomery, AL – WZHT Radio Show
May 23 – Las Vegas, NV – KLUC Radio Show
May 28 – San Antonio, TX – Municipal Auditorium
May 29 – Phoenix, AZ – Celebrity Theatre
June 4 – Providence, RI – WWKX Radio Show
June 5 – Hartford, CT – WZMX Radio Show
June 6 – Detroit, MI – WHTD Radio Show
June 11 – Ft. Lauderdale – performance
June 12 – Denver, CO – KQKS Radio Show
June 13 – St. Louis, MO – KPRS Radio Show
June 14 – Boston, MA – WJMN Radio Show
June 17 – Grand Rapids, MI – Delta Plex Arena
June 19 – Greensboro, NC – WJMH Radio Show
June 20 – Atlanta, GA – WHTA Birthday Bash
June 24 – St. George, UT – KXBN Radio Show
June 25 – Blackfoot, ID – El Rey performance
June 26 – San Fransico, CA – KYLD Radio Show
June 28 – BET Awards
July 2 – Columbia, SC – Colonial Life Arena
July 3 – Atlanta, GA – James Brown Arena

Jennifer Hudson has had to reschedule dates on her current North American tour over vocal issues.

“Due to strain found on her vocal chords, Jennifer Hudson has been instructed by her doctor to go on vocal rest,” her rep said in a statement Tuesday.

The tour — also featuring R&B crooner Robin Thicke –has rescheduled three dates so far. The Dallas tour stop, which was scheduled for Thursday, May 7, will now occur on May 16. Houston goes down May 17, while Jen’s May 3 date in Oakland, CA. has been moved to May 19.

We hear Beyonce’s baby sister, Solange Knowles, is in discussions to perform as the opening act for Michael Jackson’s upcoming 50-Date European Tour at London’s O2 Arena this summer.

Rihanna is planning to hit the road on a tour of North America this Fall–and she’ll be in good company.

R&B divas Ciara and Keyshia Cole are in negotiations to join the embattled “Disturbia” singer on her first trek since the start of her domestic violence scandal with crooner Chris Brown, E! News claims

“Rihanna wants strong women to join her….This is a ‘women empowerment’ type of tour.”

Beyonce is bringing her 2009 World Tour to North America this summer. Beyonce’s I AM…. excursion kicks off with a series of full-length concerts at New York’s Madison Square Garden in June.

BEYONCE’S “I AM…” 2009 NORTH AMERICAN CONCERT DATES ARE AS FOLLOWS:

DATE CITY VENUE
Sun/Jun-21 New York City, NY Madison Square Garden
Wed/Jun-24 Washington DC Verizon Center
Fri/Jun-26 Philadelphia, PA Wachovia Center**
Sat/Jun-27 Greensboro, NC Greensboro Coliseum Complex
Mon/Jun-29 Ft Lauderdale, FL Bank Atlantic Center
Wed/Jul-1 Atlanta, GA Philips Arena
Fri/Jul-3 New Orleans, LA Superdome (Essence Music Festival)
Sat/Jul-4 Houston, TX Toyota Center**
Sun/Jul-5 Dallas, TX American Airlines Center
Tue/Jul-7 Phoenix, AZ US Airways Center
Thu/Jul-9 Sacramento, CA Arco Arena
Fri/Jul-10 Oakland, CA Oracle Arena
Sat/Jul-11 Anaheim, CA Honda Center
Mon/Jul-13 Los Angeles, CA Staples Center
Thu/Jul-16 Minneapolis, MN Target Center
Fri/Jul-17 Chicago, IL United Center
Sat/Jul-18 Detroit, MI Palace of Auburn Hills
Thu/Jul-23 Uncasville, CT Mohegan Sun
Thu/Jul-30 Las Vegas, NV Encore Theater, Wynn Las Vegas
Fri/Jul-31 Las Vegas, NV Encore Theater, Wynn Las Vegas
Sat/Aug-1 Las Vegas, NV Encore Theater, Wynn Las Vegas
Sun/Aug-2 Las Vegas, NV Encore Theatre, Wynn Las Vegas