Did Billy Lawrence Contribute To Jennifer Lopez's "On The 6" ?

I've heard that Billy and her brother Kyra wrote and sang background on Jennifer Lopez's album On The 6.

I found these credits but I'm not sure if the Bill Lawrence is supposed to be Billy or is infact a Bill.

Personnel: Jennifer Lopez (vocals); Claytoven Richardson, Sandy Griffith, Rita Quintero, Wendy Peterson, Lena Pérez, Shawnyette Harrell, Skyler Jett, Bill Lawrence, Jennifer Karr (background vocals).

Did she help create On The 6? Are the songs ones that made the album? If so, which ones?