Gwen Stefani found out how devoted one fan could be. After her high-energy runway show at Lincoln Center on Thursday night for her clothing line, L.A.M.B., she went to the Empire Hotel for an after-party thrown by L’Oréal on the hotel rooftop.

PHOTOS: GWEN STEFANI

According to a witness, a diehard fan at the party pulled up his shirt and showed the No Doubt singer a tattoo of Stefani’s face and her autograph, inked on his abs. Stefani kept her composure and thanked the fan for his loyalty.