Fridge Brilliance: This troper has heard a few fans comment that "Me, Myself, & Time" doesn't sound like a Demi Lovato song. The brilliance comes into play because the song isn't a Demi Lovato song... it's a Sonny Munroe song.
All the singing and dancing in Season 2. Big-Lipped Alligator Moment to some, but to others, it's Truth in Television and a reflection of how both major kid studios hand-pick (especially the girls) their talent now almost as much about how good they can sing as how good they could act or make people laugh. Marshall probably got ordered to increase the musical segments to sell a So Random CD or something.