The Britney Spears media onslaught continues. Less than 48 after premiering her long-awaited new video "Hold It Against Me," the pop princess leaked a 10-second snippet of her rumored second "Femme Fatale" single, "Inside Out."

Dr. Luke, the song's producer, initially posted the teaser to Twitter and Spears re-Tweeted the link on Friday with no additional comment.

Brit Teaser.... :-) by drluke

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Britney's longtime manager, Larry Rudolph, told MTV News that fans are "in for a real treat" with the next single.

"We have a second song that I think we're gonna end up putting out before the album drops," he said. "I can't say with 100 percent certainty, but I think we probably will... It is a monster. It really is.

"I don't think I've been this excited about releasing a Britney single in many, many years -- it's that good," Larry added. "I haven't heard a final mix of it, but I should get it in the next day or two. So far, what I've heard is just extraordinary. It really is amazing."

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Britney has been hitting the studio with the Black Eyed Peas' Will.i.am, who recently tweeted about the pair's collaboration.

"In the studio with @britneyspears today. we recorded another song for #femmefatale. that's 2 bangers," Will.i.am Tweeted on Thursday, along with a photo of himself with Spears.

"@iamwill We make sweet sweet music...." Britney responded her own twitter account.

"Femme Fatale," Britney's 7th studio album, is scheduled for release on March 29.

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