Courtney Love and daughter Frances Bean made a rare public appearance together at the premiere of the documentary, Cobain: Montage of Heck, at the Sundance Film Festival. Love, the widow of Nirvana frontman Kurt Cobain, and Frances, their daughter and an executive producer on the film, have had a rocky relationship but presented a united front on the red carpet Friday. The film, directed by Brett Morgen, is the first authorized film about Cobain.