Watch 5SOS Rehearse For The VMAs! (Yes, This Is Really Happening!)

The guys perfect 'Amnesia' before Sunday's show at 9 p.m. ET.

5 Seconds of Summer have their band shirts pressed, their guitars tuned and their extremely cool set constructed -- they're ready for the 2014 MTV Video Music Awards.

Ashton, Luke, Michael and Calum rehearsed "Amnesia" at the Forum in Inglewood, California, on Saturday (August 23), a day before the big show. The guys wore their signature band tees as they worked out harmonies and perfected lighting.

Related: 5SOS Transform Into Emojis… Will They Change Back Before The VMAs?

The band is up for Artist To Watch at Sunday night's show. Voting is still open for Best Lyric Video -- the socially voted category they're nominated for with Demi Lovato, Katy Perry, Austin Mahone and Ariana Grande. Tune in to see which 5SOS member will have a wardrobe malfunction.

Movie & TV Awards 2018