The whirlwind of awards season seems to get bigger every year with more parties, events and publicity -- so what keeps the stars running? ET found out at Monday's GRAMMY Awards.

Sam Smith went with the tried and true route to get his pick-me-up.

"Coffee," Smith answered when asked what keeps him going. "Normally alcohol, but I am not drinking today, which is a good thing."

Pharrell Williams won his 11th GRAMMY on Monday, taking home Best Rap Song for "Alright" from Kendrick Lamar's To Pimp a Butterfly, and it didn't take much to keep him going through the night.

"Just being grateful to be here and to be a part of the process," Williams told ET. "It's awesome."

Pauley Perrette used food to keep her fueled through the festivities.

"I had a little turkey sandwich earlier," said the NCIS star.

For The Late Late Show host James Corden, it's the thrill of multitasking that keeps him going.

"We have a show to do tonight, so I am not really thinking about the GRAMMYs," Corden told ET before the show. "I have to sort of introduce, and then leave and go back and shoot our show."

The comedian recruited GRAMMY winner Justin Bieber for a special post-GRAMMY edition of "Carpool Karaoke" on his CBS late-night talk show. For the pop star's third time in the passenger seat with Corden, the two opted to sing Bruno Mars' "Uptown Funk" rather than one of Bieber's hits.

The night was a big one for Bieber, as he took home his first GRAMMY for the dance track, "Where Are U Now," featuring Skrillex and Diplo.

This awards season, ET's red carpet runs on Dunkin' Donuts.