Just days after releasing her much-anticipated video for 'Hold It Against Me,' Britney Spears gave fans even more to be excited about. The singer and her music producer Dr. Luke released a 10 second snippet of a new song titled 'Inside Out.'

Dr. Luke, who has worked on Spears' upcoming album, 'Femme Fatale,' was the first to tweet the clip, in which Spears sings, "Come on/Won't you give me something to remember/Baby shut your mouth and turn me inside..."

Spears also re-tweeted Dr. Luke's link to snippet.

Though it was rumored 'Inside Out' was the second single off the album -- due out March 29 -- Dr. Luke is keeping fans in suspense.

He tweeted over the weekend, "i never said inside out is the 2nd single... :-p" He also teased that Spears' second single will be out soon, tweeting Sunday night, "maybe i'm sending brit's next single out for mix now!!!...." Listen to the 'Inside Out' snippet after the jump!