Dave Franco Promotes 'Nerve' by Challenging Celebs to Sing in Public -- See Their Hilarious Videos!

Dave Franco is challenging his celeb pals to "find their nerve."

As a way to promote his latest film, Nerve, the 31-year-old actor is daring people to record themselves singing in public and post it to their social media accounts with the hashtag "#FindYourNerve."

WATCH: Dave Franco & 8 Stars Who Stole Out Hearts From Their Famous Siblings

Dave kicked off the challenge in New York City, singing Backstreet Boys' "I Want It That Way" in the middle of an Apple store. He later shared the video to Facebook on Wednesday, writing, "I challenge James Franco, Alison Brie and Chris Mintz-Plasse to #FINDYOURNERVE and embarrass yourself by singing in public too. You have 24 hours. GO!"

And it looks like the challenge has already been accepted!

Dave's older brother, James Franco, performed the dare inside a convenience store with two friends. His song of choice? Justin Bieber's "Sorry."

Check out those hip movements!

My brother challenged me to sing in public. I dare @mastergia , @spagettyos , and @ahnaoreilly to #FINDYOURNERVE

A video posted by James Franco (@jamesfrancotv) on Jul 21, 2016 at 10:58am PDT

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Christopher Mintz-Plasse, who starred in Neighbors with Dave, belted out Tina Turner's "What's Love Got to Do With It" in the middle of a movie theater lobby in Los Angeles.

#DaveFranco challenged me to sing in public. I challenge @nicholasbraun , @alisonwonderland , @copekills , and @patrickalandavis to #FINDYOURNERVE you have 24 hours!! #nerve

A video posted by Chris Mintz-Plasse (@mintzplasse) on Jul 20, 2016 at 5:08pm PDT

Alison Brie, Dave's fiancée, showed off her singing skills with Whitney Houston's "I Wanna Dance With Somebody" near the fresh produce section. Girl's got pipes!

Meanwhile, Dave's Nerve costar, Emma Roberts, was channeling her inner '90s girl by singing the Spice Girls' 'Wannabe" on a subway in the Big Apple.

#findyourNERVE I dare @kekepalmer @praisethelourd @britelkin @kakeykake to go sing in public! You have 24 hours 👻#Nerve #July27

A video posted by Emma Roberts (@emmaroberts) on Jul 21, 2016 at 12:50pm PDT

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See more hilarious #FindYourNerve moments below:

Challenge accepted @jamesfrancotv Summer Lovin' & dodging LAX traffic police, all for the love of Dave Franco #FINDYOURNERVE your turn @nadiaquinn @lesliekritzer @beaniefeldstein @jenniferzaborowski 24 hrs GO!

A video posted by Ahna O'Reilly (@ahnaoreilly) on Jul 22, 2016 at 11:56am PDT

Challenge accepted @mintzplasse and #daveyfranco!!!! Thanks to little brother @braunmusic for guitar and harmony support 💙 I CHALLENGE TO SING IN PUBLIC W/in 24 HOURS, three people with incredible pipes @zoeydeutch and @teoriah @annakendrick47 to #findyournerve

A video posted by nicholasbraun (@nicholasbraun) on Jul 21, 2016 at 8:28pm PDT

I was called to action by Alison Brie #findyournerve now I challenge these singers @parvey @skrautr @verbalberappin

A video posted by sauerkraut13 (@sauerkraut13) on Jul 21, 2016 at 9:45pm PDT

@britelkin and I completed our dare by @emmaroberts #findyourNERVE (FML SO HARD)

A video posted by kara ELKIN (@kakeykake) on Jul 22, 2016 at 12:40pm PDT

Ok @sauerkraut13! We did it! @sunshinesonal #findyournerve @skrautr @verbalberappin your turn. Also. I nominate @theonebrownhand @jayababy and @ben_rappaport to sing in public next!!!

A video posted by Parvesh Cheena (@parvey) on Jul 22, 2016 at 12:32pm PDT

#FINDYOURNERVE @alisonbrie I see your challenge and I raise you @JamesRoday @dpanabaker @adelsteinPaul 24 hours GO!! pic.twitter.com/Nvrm0x7ZZf

— Julianna Guill (@juliannaguill) July 22, 2016

WATCH: Emma Roberts Plays Coy on Kissing Both Franco Brothers

As we patiently wait to see what dares are pulled in the actual film, which hits theaters on July 27, watch the video below to hear Emma gush to ET about kissing both Franco brothers!