Lady Gaga is to front her second campaign for MAC`s Viva Glam. The 24-year-old singer - who starred in her first set of adverts for the brand with Cyndi Lauper - is returning to the make-up company for 2011. The campaign has already been shot by Nick Knight and styled by Thierry Mugler head and Gaga`s personal friend Nicola Formichetti. Proceeds from the campaign benefit the MAC AIDS fund, a cause which Gaga is personally involved with. Speaking earlier this year, she said: "We want to make this trendy and fun. Sex education should be bright and vibrant and every woman should want to have this in her purse." The eccentric star is a huge make-up fan, and recently revealed she "hyperventilated" when photographer Steven Klein asked her to go without it on the set of video `Alejandro`. She said: "We are both very strong-willed and we both have very specific visions. And I knew his specific vision and he knew mine so that it was like tugging at a rope together. And then we tied a beautiful knot! I wanted to bring him out of his comfort zone and he wanted to bring me out of mine. "He was stripping me down, taking off all my make-up, no eyelashes, no liner, saying, `I`m cutting all of your hair off` and not tanned ... For me, I was hyperventilating, but it did force me to be myself."