Are Diego and shira going to sing in ice age 4?

In one of his recent interviews Denis Leary (The voice of Diego) said the following statement,

"I'm working on Ice Age 4 right now, and Jennifer Lopez is voicing my love interest in that movie, how cool is that? In fact, we're working on getting ready to record a song for the film too, should be interesting."

So according to this, unless the song gets cut or something, it looks pretty good that we're going to see these two sing.

Also, Jennifer Lopez and Denis Leary are singers so... that helps your cause.