Jack & Jack Perform 'Beg' On 'Today' Show - Watch!

Jack and Jack flash their pearly whites while posing for a photo at Music Choice on Wednesday (January 10) in New York City.

The guys – Jack Johnson and Jack Gilinsky – stopped by the music company as part of their promo day for their song “Beg” as it hit radio that day.

Earlier in the day, the guys performed the hit song on the Today show. Watch their performance below!

“today has been unreal.. the support is really blowing my mind. i can’t express how excited i am about the future. we have so much in the works. thank u to anyone & everyone who is with us. this is only the beginning,” Jack G tweeted later in the day.

In case you missed it, check out Jack and Jack going shirtless for a beach day on New Year’s Eve.