Well, this is one way to promote a movie.
With The Neighbors coming out this Friday, Zac Efron and Seth Rogen appeared on The Tonight Show with Jimmy Fallon last night.
At least we think it was Zac Efron and Seth Rogen.
The cross-dressers who appear in the following episode of "Ew!" with the talk show host sure do look like those male stars, don't they?
Seth Rogen and Zac Efron Go Drag on The Tonight ShowRogen ripped Justin Bieber earlier in the week, while Efron opened up to The Hollywood Reporter about his stint in rehab.
The actors are merely the latest big names to stop by The Tonight Show and create quite the viral stir.
Here are a few more recent examples:
18 Hilarious Segments from The Tonight Show with Jimmy Fallon
Open Slideshow 1. Jimmy Fallon and Billy Joel Duet Jimmy Fallon and Billy Joel put on a great duet in this video. Watch the Tonight Show host and music icon go! View As List 
1. Jimmy Fallon and Billy Joel Duet
Jimmy Fallon and Billy Joel put on a great duet in this video. Watch the Tonight Show host and music icon go!
2. Jimmy Fallon: First Lick (First Kiss Parody)
Jimmy asked 20 puppies and kittens to kiss for the first time in this "First Kiss" parody.
3. Jimmy Fallon, Jon Hamm Photobomb People
Jimmy Fallon and Jon Hamm photobomb people in NYC. It's great.
4. Lindsay Lohan-Jimmy Fallon Water Fight!
A clip of Lindsay Lohan on The Tonight Show with Jimmy Fallon on March 6, 2014. Watch the two of them have a water fight!
5. Jimmy Fallon Lip-Sync Off with Paul Rudd
Jimmy Fallon and Paul Rudd compete in a lip-sync off. And it's pretty epic.
6. Michelle Obama on The Tonight Show with Jimmy Fallon
Michelle Obama is quite the good sport. Watch her star in a Tonight Show sketch here with Jimmy Fallon and Will Ferrell.
7. Jimmy Fallon Tonight Show Debut
Jimmy Fallon is officially the host of The Tonight Show. Relive his opening episode here.
8. Jimmy Fallon Jokes About Justin Bieber
Jimmy Fallon jumps on the anti-Justin Bieber bandwagon in this monologue. Watch him crack some jokes at the artist's expense.
9. Kevin Bacon Goes Footloose on The Tonight Show
This is awesome! Watch Kevin Bacon recreate his iconic "Footloose" dance on The Tonight Show.
10. Samuel L. Jackson Poetry Slam, Boy Meets World Style
This is an amazing video of a Samuel L. Jackson poem dedicated to the his sitcom Boy Meets World. It is from The Tonight Show.
11. Sarah Palin on The Tonight Show with Jimmy Fallon
Sarah Palin shows off her comedic skills on The Tonight Show with Jimmy Fallon. Check out this skit in which she calls "Putin."
12. Robinson Cano Pranks Yankee Fans
Yankee fans boo Robinson Cano in this Jimmy Fallon video. Until they actually meet Robinson Cano, that is.
13. Emma Stone Lip-Syncs Against Jimmy Fallon
We adore Emma Stone. Watch her battle Jimmy Fallon in this video, lip-sync style!
14. Diane Keaton Plays Beer Pong on The Tonight Show
Diane Keaton takes on Jimmy Fallon in Beer Phong in this Tonight Show segment. Watch now!
15. Jimmy Fallon and Cameron Diaz Photobomb Tourists
Jimmy Fallon and Cameron Diaz sneak in behind tourists at 30 Rock and photobomb their pictures in this hilarious video. Check it out now!
16. Andrew Garfield Plays Spider-Man Theme Song
Andrew Garfield plays The Spider-Man theme song during this appearance on The Tonight Show. And he slays it!
17. Bryan Cranston Plays Word Sneak on The Tonight Show
Bryan Cranston plays Word Sneak here on The Tonight Show. But watch now as the star runs into a big problem.
18. Seth Rogen and Zac Efron Go Drag on The Tonight Show
Jimmy Fallon plays "Ew!" with Seth Rogen and Zac Efron in this great Tonight Show clip. Watch and laugh now!
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