The Rock's secret to singing success in 'Moana'? Tequila

Bryan Alexander | USA TODAY

Show Caption Hide Caption How 'The Rock' warms up his singing voice Dwayne 'The Rock' Johnson shares his secret for warming up his singing voice.

Dwayne 'The Rock' Johnson has a secret to his mad singing skills seen in Moana.

Tequila.

That's right, Johnson insists he took the strong stuff to get voice-ready as the demigod Maui in Disney's animated film.

Just a sip, mind you, of tequila and "going through the vocal ranges." Opera singers do the same thing.

Johnson did take his prep for singing You're Welcome, the song written by Hamilton creator Lin-Manuel Miranda, very seriously. He practiced the song every free moment for months — on the set, in the gym, in the Rock truck.

The results speak for themselves in the show-stopping Moana number.

The Rock even gave us a sample, with a big assist from Auli'i Cravalho, who voices Moana. Check out the video below. Clearly, he needed tequila before actually singing.