Hits They've Written: Demi Lovato's "Heart Attack," Jason Derulo f/ 2 Chainz's "Talk Dirty,"  Jason Derulo f/ Snoop Dogg's "Wiggle"

Douglas is the son of actor Michael Keaton, and Batman's little boy sure has been putting in work. Last year, he co-wrote Demi Lovato's "Heart Attack," and this year he's already landed songwriting credits on Jason Derulo's "Talk Dirty" and "Wiggle," respectively.