How many episode Sonny With a Chance in season 1 is?

sunny has 15 chapters between stars that are of the first season but has also appendices of chapters so it has 21 chapters in total

There are 21 episodes, but season 2 starts in January/February (Disney does not have an set date for episode 1 season 2 "falling for the falls"). I wish they could start season 2 in December (now) because i want to know what happens with sonny and chad.