LOS ANGELES, CA - FEBRUARY 08:  Singer Katy Perry attends The 57th Annual GRAMMY Awards at the STAPLES Center on February 8, 2015 in Los Angeles, California.  (Photo by Jason Merritt/Getty Images)
LONDON, ENGLAND - NOVEMBER 23:  Lily Allen attends the British Fashion Awards 2015 at London Coliseum on November 23, 2015 in London, England.  (Photo by Anthony Harvey/Getty Images)
Green ombre hair
Woman with pink hair over one eye in a black dress
TORONTO, ON - JUNE 19:  Lady Gaga poses in the press room at the 22nd Annual MuchMusic Video Awards at the MuchMusic HQ on June 19, 2011 in Toronto, Canada.  (Photo by George Pimentel/WireImage)