Katy Perry's 'Swish Swish' Lyric Video Stars Brazilian Singer Gretchen: Watch

Brazilian singer Gretchen stars alongside a dance troupe in Katy Perry's new "Swish Swish" lyric video, which was fittingly filmed on a basketball court. 

"She's amazing. She's iconic," Perry said of her video star, in a clip tweeted by Gretchen.

"MORTA LINDA!" Perry tweeted with a GIF of one of Gretchen's memorable expressions. "THE LYRIC VIDEO U DIDN'T ASK FOR BUT THE INTERNET NEEDS."

Gretchen had a string of hits in the '80s -- “Freak Le Boom Boom," “Melô do Piripipi” and “Conga Conga Conga” -- and is more recently known around the internet for being the subject of some awesome reaction GIFs.

The "Swish Swish" visual, directed by Dario Vetere, features choreography by Fabio Duarte and CK Calasans.

Check out Gretchen's moves below.