They stated that they plan to keep their music careers separate from the series, although Michalka advised that she would sing in the fourth episode.
Some critics noted their surprise that Tony Award-winning actor Michael Cerveris did not sing in the episode.
Berry sings his hit song, "Rock and Roll Music" in the episode which aired on December 16, 1957.
"I've Been Working on the Railroad", the song whose first verse the doctor sings in the episode.
Sawyer sings it in the ninth episode of the third season of Lost.
The release also mentioned that Peters will sing in the episode.
He can be heard singing the song "Miles From Here" in the first episode of the television series Fame titled "Metamorphosis".
The song was also sung in the episode Captain Jack Harkness on Torchwood.
He was also one of several musicians who sang a mock charity appeal in the final episode of Season 3 of 30 Rock.
Self-conscious about her singing abilities, Alyson Hannigan requested not to be given a song and sings only a few lines in the episode.
