Janet Jackson used her Twitter to announce that she and ex-boyfriend Jermaine Dupri have teamed up to record the theme song for her next film, “Tyler Perry’s Why Did I Get Married Too?” “Hey u guys, Jermaine n I just finished the theme song for the film. I hope u like!” she tweeted. Titled “Nothing,” the song also features Bryan-Michael Cox as a producer. In “Married Too?” due in April, Janet reprises her role as Patricia Agnew. She is also in the studio working on a new album with Dupri and Cox.