Lady Gaga

Of course she did.

During her first SXSW performance Thursday night, Lady Gaga let artist Millie Brown — otherwise known as the vomit painter — puke on her chest.

As Gaga performed "Swine," Brown repeatedly stuck her fingers down her throat and regurgitated bright green milk onto the singer, making us once again question what exactly Nickelodeon's notorious slime was made of.

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Brown is famous for her unorthodox painting technique, where she drinks brightly dyed soy milk before vomiting onto a canvas, creating Jackson Pollock-inspired splatter. Gaga has long been a fan of the artist, even featuring her in the controversial music video Exorcist Interlude.

Watch the pair's latest puke-filled collaboration below (skip to the 1:55 mark for the vomit).