Tonight Show: Seth Rogen, Zac Efron Dress Up As Teenage Girls For “Ew!”

Fatimah Mazhar
Jimmy shows a clip from the Teen Nick show "Ew!" in which Sara has two friends drop by to take selfies.

Zac Efron joined his co-star Seth Rogen for “Ew!” to promote their new film Neighbors on the Tonight Show.

The hilarious skit features host Jimmy Fallon dressed as Sara the bored teenage girl who invites different friends over to have fun.

This time around, “besties” Alison Donnelly (Rogen) and Britney Anderson (Efron) paid a visit and the trio had quite a lot of fun together.

The highlights include:

- A selfie session with Britney’s eight megapixel camera. Jimmy and Seth pulled funny faces while Zac brought on his smolder look.

- A dance off to “Turn DownFor What” – a song Britney just couldn’t get out of her head. Unfortunately, Sara’s stepdad interrupted and ended up embarrassing her in front of Alison and Britney.

- Text messages from James Franco to all three of them.

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Rogen also appeared on the Howard Stern Show on Monday and made headlines after he blasted singer Justin Bieber for being a piece of s**t.

"He's a good example of someone you meet, who you think you're going to hate, and then you get to hate him as much as you thought," he said on the show. "You meet him, and he lives up to every one of your expectations of how you hope he will be."

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Neighbors starring Zac Efron, Seth Rogen, Dave Franco and Rose Byrne will hit the screens on May 9.