The 17-year-old has taken over from Ashton Kutcher as celebrity prankster on the MTV show, and is said to have lured Swift round to his beach pad by asking her to help him write a song for Gomez. A source told Hollywoodlife.com, "Justin called Taylor Swift and asked if she would come over to his beach house and help him write a song for Selena Gomez. Taylor agreed and even asked him to open for her at her show that night at the Staples Center."
The Biebs then apparently convinced Swift to help him set off some fireworks in his backyard before making it look like they have actually set fire to a nearby boat where a wedding was taking place.
Actors dressed for the occasion then swam up and accused Taylor of ruining their big day. "Taylor didn't start crying but was very freaked out and was like 'OMG I'm so sorry!' Justin was trying to downplay the situation. When he said she'd been punk'd she started laughing and said, 'How could you do this to me?!'" the source added.