[1] He founded Cherrytree Records (or The Cherrytree Music Company) in 2005, a record label and management company through which he has signed artists including Lady Gaga, Sting, Keane, LMFAO, Disclosure, Ellie Goulding, Far East Movement, Feist, La Roux, the Knux, Robyn, t.A.T.u., and Natalia Kills.
He has been credited on releases by Madonna, Mylène Farmer, Tokio Hotel, Feist, Ai, Samantha Fish, and Alexandra Burke.
He lived in South America, UK and Continental Europe before eventually moving to New Haven, Connecticut.
He then went on to the Annenberg School of University of Southern California to complete his master's degree in communications management.
Kierszenbaum was promoted to head of international operations and was responsible for discovering and signing non-American artists.
His idea to promote t.A.T.u's single "All the Things She Said", whose lyrics he wrote, in Japan through karaoke bars led to 1.7 mil copies sold in the country.
Also in the song "I Wanna Touch You" by Colby O'Donis and "White Flag" by Far East Movement featuring Kayla Kai, from their album Free Wired.