WWdn't আপনি lie Allisyn to sing on the show?

Did আপনি notice Allisyn wasn't on the song-episodes? Examples? Walk A Mile In My Pants, Sonny with a song. Sure, she appeared on HSMiserable, but she never got a long গান গাওয়া part(But Tiffany,Doug and Brandon did). So who wants to see her singing?