British singer Rita Ora, the voice behind the super-catchy pop hit "How We Do," painted on some party-perfect lips when she performed at Absolut Tune's launch in New York last night. It's MAC's Ruby Woo, she told us, which you can get over on maccosmetics.com for $15. (The shade is also a favorite of Maggie Gyllenhaal.) The hue amps up the singer's glammed-up street style look, which helps her party girl persona. "Everyone always asks me, 'So Rita, How you do? Do you like to party?'" the 21-year-old told InStyle.com at the event. "And my answer is, 'Yeah, I do!' I’m loving it." See more celebrity lip colors we love in the gallery.