New details have emerged about Taylor Swift's appearance with Justin Bieber on the premiere of MTV's Punk'd.

During the episode, teen heartthrob Justin Bieber invites Taylor to his beach house to help him write a song for his girlfriend, actress/singer Selena Gomez, according to Hollywoodlife.com. Justin then convinces the country singer/songwriter to shoot fireworks over the ocean. Of course, things take an "unexpectedly" bad turn when those fireworks "accidentally" hit a boat offshore, setting it ablaze . . . and a wedding happens to be taking place on the boat at the time.

In one dramatic scene, the wedding party and guests “swim for their lives.” Of course, all of the people aboard the boat are actors, but Taylor is reportedly “freaked out” that she ruined someone’s wedding . . . until Justin lets her in on the secret: she’s been Punk’d.

An official day for the season premiere of Punk'd has not been announced.