What are all of jls favorite songs called and by?

They don't have specific favourite songs. However, their favourite artists are:

Oritse: Tina Turner, Stevie Wonder, Prince, Michael Jackson, Lenny Kravitz, Usher, Musiq Soulchild, Aretha Franklin, India Arie & John Legend

Marvin: Michael Jackson, Marvin Gaye, Stevie Wonder, Usher, Ne-Yo, Mariah Carey, Prince, Boyz II Men, Justin Timberlake & Craig David

Aston: Usher, Mario, Michael Jackson, Beyonce, Chris Brown & Boyz II Men

JB: Michael Jackson, Beyonce & Lionel Richie

These artists are listed as the main influences behind their songs/style of music.