Christina Aguilera is promising that Britney Spears will "Come on Over" to perform with her at her upcoming Las Vegas residency. "We're in Vegas; it's inevitable," Aguilera tells E! about Spears making a cameo appearance during her Christina Aguilera: TheXPerience show.
"Let's bring all of our forces together and make this happen." Xtina also says she plans to call up Spears and other stars who've done Vegas residencies for advice.
"There's so much history where I'm going and I just feel like calling up all those girls--Lady Gaga is the newest one there," she says.
"I wanna get the real scoop from all of them and be like, 'What's it really like?'" XPerience kicks off May 31 at the Zappos Theater inside the Planet Hollywood Hotel and Casino.
Tickets go on sale February 2 at 1 p.m. ET.