Watch: Lady Gaga's performance at SXSW 2014

Lady Gaga appeared on Doritos Bold stage at SXSW 2014 in Austin, Texas on Thursday (13).

The Mother Monster sang several songs from her latest album, "artpop", including hit single "Bad Romance."

The highlight of the evening was the unusual performance of "Swine". During the performance, Gaga invited her friend Millie Brown to take the stage, who came with a bottle of green liquid. After taking the drink, Brown threw up on the singer.

Millie Brown is a photographer known for doing performances based on drinking of colored liquid and then vomiting them on screens.

Watch Lady Gaga’s performance at the SXSW 2014 festival below: