SOS WORLD BUZZ

Christina Aguilera Announces 'Bionic' Summer Tour Dates.Aguilera's "Back to Basics" album has sold 1,694,000 copies, according to Nielsen SoundScan. Her 2008-released greatest hits set, "Keeps Getting Better: A Decade of Hits," has sold 338,000.

Christina Aguilera will return to the stage this summer, when she kicks off a 20-date North American outing on July 15, tour producer Live Nation announced today (May 10). Leona Lewis, the British pop singer, will also appear on the dates.

Aguilera's latest album, "Bionic," her first since 2006' "Back to Basics," is due in stores on June 8, and all fans who purchase tickets for the tour before June 4 will receive a download code for a digital copy the album on June 7, the day before its official release.

Tickets for all the dates go on sale to the public beginning May 21 at LiveNation.com, with a presale for Citibank cardmembers starting May 19. Complete ticket and tour information can be found at ChristinaAguilera.com.

Aguilera recently appeared on the "Oprah" show, and has scheduled a number of television appearances -- including live appearances at the MTV Movie Awards and on the Today Show Summer Concert Series -- in conjunction with the album's release.

Recorded in Aguilera's home studio, "Bionic" features collaborations with Sia, Le Tigre, Christopher "Tricky Stewart," Hill & Switch and Ladytron, and a ballad entitled "Lift Me Up" written  by Linda Perry, who also penned "Back to Basics" singles "Hurt" and "Candyman" and Aguilera's 2002 hit, "Beautiful."


Aguilera also recently wrapped filming on "Burlesque," which co-stars fellow pop diva Cher and is slated for a fall 2010 release.

Maxwell, Jill Scott Gear Up for 'Summer' Tour. Maxwell, who will complete the trilogy with "Blacksummers`NIGHT," says he has all the songs together for "BlackSUMMERS'night.

Maxwell says that his upcoming tour with Jill Scott is "my dream come true, basically."

The two R&B singers kick off a 20-show run on May 21 in Cleveland. Maxwell will close each night, but he tells Billboard.com that he's hoping he and Scott will collaborate at some point during the night. "I would love to. I think it would be great," Maxwell says. "I think it would be great to create something special like that because she's just so good, you know? It's two different shows; she's got her own look and her own thing she's doing visually and stagewise, and I have my own thing. But hopefully we'll be able to overlap the show, somehow. I think people deserve that, something special like that."

Kelly Clarkson has penned a new song in response to her ongoing feud with her label, RCA/Sony Music, and OneRepublic frontman Ryan Tedder.

The recently-leaked track, "Wash, Rinse, Repeat," allegedly addresses the controversy surrounding Clarkson's 2009 single, "Already Gone." Last summer, "Already Gone" came under fire for its similarities to Beyoncé's "Halo," which was released nearly 8 months prior to Clarkson's single.