Justin Timberlake has reportedly teamed up with girlfriend Jessica Biel in the recording studio.

The "SexyBack" hitmaker has penned songs for Biel's forthcoming album, and will also sing on some tracks, according to online reports.

A source tells AngryApe.com, "Justin's written and produced the best part of an entire album for Jessica.

"He wants to get his own fans on side, so he's provided backing vocals on most of the tracks too."