Out of 18 original tracks on the soundtrack, Lady Gaga is credited as a writer or cowriter on 13 of them, including the powerful finale "I'll Never Love Again." The big ballad featured in the trailers, "Shallow," is one of her signature songs, co-written with Mark Ronson, Anthony Rossomando, and Andrew Wyatt. It was also at Gaga's insistence that the movie's songs were recorded live on set, rather than recorded separately and lip-synced during filming.