Watch Me Do was co-written by the rapper who best known for what 2015 single?
Watch Me Do:  Produced by Ricky Reed, he co-wrote the song with Trainor, Jacob Kasher Hindlin and Gamal Lewis. LunchMoney Lewis: Gamal "LunchMoney" Lewis (born January 11, 1988) is an American rapper, singer, songwriter and record producer.
i don't know