Talk:My Little Pony theme song/@comment-26113331-20140212173350/@comment-4531340-20140212192710

In the case of Becoming Popular, it's Rebecca Lam (too lazy to check if that's right right now); in the case of Smile Song, Andrea Libman sings the backing vocals, and for the extended version of this song, Shannon Chan-Kent backs up Rebecca Shoichet. Or are you asking what the backup singer does? If that's the case, it's the second person that you can occasionally hear singing underneath the main singer in the song (in Smile Song it's really apparent; haven't listened to Becoming Popular in a while)