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 Schaffer of The Lonely Island for their 2009 debut album "Incredibad", and was featured in an SNL Digital Short for the same song. In addition, he also recorded "I Wish It Was Christmas Today", a festive song based on a "Saturday Night Live" skit made popular by Jimmy Fallon, Horatio Sanz, Chris Kattan and Tracy Morgan. Casablancas performed the song live on "Late Night with Jimmy Fallon" on December 21, 2009, together with The Roots, Horatio Sanz and Jimmy Fallon. He also appeared in the 100th Digital Short, which aired on May 12, 2012. Casablancas also collaborated with Danger Mouse