Haim (band) spotted by musician Jenny Lewis at a jam session in Laurel Canyon, which led to Danielle joining Lewis' touring band. The Strokes' singer Julian Casablancas came to see one of Lewis's shows on tour, and he in turn asked Danielle to play guitar and percussion on his solo tour. Danielle rehearsed with Casablancas' band every day for two months, which she later described as "an eye-opening experience." Following working with Casablancas from late 2009 to mid 2010, she auditioned for a place in Scarlet Fever, the all-female backing band for CeeLo Green. Danielle performed only once with the group, on
Julian Casablancas New York, the album was produced by Jason Lader, with additional production from Bright Eyes' Mike Mogis. The album was strongly influenced by new wave and electronica, with Casablancas utilizing synthesizers for many songs. He discussed his new influences by saying "I would've gone weirder with the music, but I wanted to be smart. I didn't want people to say, 'Okay, this is his weird abstract thing,' and dismiss the album. I worked too hard on it for that to happen...I wanted to be crazy original and bridge the gap between traditional music and modern music." Julian Casablancas made his