DeAngelo Williams was one of the most popular players in Panthers history. He's also wildly popular with his kids, as evidenced by this video he put on Facebook on Tuesday: Here's Williams enjoying Frozen's "Love Is an Open Door" with his daughters.
http://www.cbssports.com/nfl/eye-on-football/25123149/watch-deangelo-williams-sings-love-is-an-open-door-with-daughters