Mariah Carey has a surprise in store for her Lambs. The pop diva has been dropping clues on Twitter about a mysterious project, which she plans to release this summer.

“So.. Summer 2012.. Been in the lab, mixing up some concoctions for you, hope you like it!! #MCSummer2012,” she tweeted along with an image that reads “MC: Summer 2012.”

While she has remained coy on details, she has been in the studio with Jermaine Dupri, Bryan-Michael Cox, DJ Clue, and Randy Jackson working on new music.

Nick Cannon also confirmed that his wife was back at work on her first non-holiday album since 2009’s Memoirs of an Imperfect Angel.

“She’s rejuvenated and ready to start sharing some of the amazing new music she has been making in the studio,” he said.

The Grammy-winning singer recently performed a new song called “Bring It on Home” for President Obama and the First Lady at a private fundraiser in New York. She has also penned a record called “Mesmorized” for Lee Daniels’ upcoming film The Paperboy.