Faustino Di Bauda

The highly-anticipated musical episode of ONCE UPON A TIME entitled 'The Song in Your Heart,' will air on Sunday, May 7 (8:00-9:00 p.m. EDT) on The ABC Television Network. Watch Ginnifer Goodwin (Snow White) and Josh Dallas (Prince Charming) perform in a new clip below!

The highly-anticipated musical episode of ONCE UPON A TIME entitled 'The Song in Your Heart,' will air on Sunday, May 7 (8:00-9:00 p.m. EDT) on The ABC Television Network. Watch Lana Parrilla sing as the Evil Queen in a new clip below!

ABC has shared a first look at the highly-anticipated musical episode of ONCE UPON A TIME titled 'The Song in Your Heart'. In the episode, one wish upon a star makes the entire enchanted forest burst into song.

ABC's ONCE UPON A TIME Season 4 debuts this Sunday night, and ETOnline caught up with two of the series' stars -- Jennifer Morrison (Emma) and Colin O'Donoghue (Hook) -- to talk about their growing romance and an upcoming 'date' (involving a snow monster?!) this season. Watch the interview below!

In the season premiere episode, “A Tale of Two Sisters,” a scared and confused Elsa finds herself in Storybrooke and, fearful of the intentions of its residents, creates a powerful snow monster for protection.