Lady Gaga was spotted leaving a London recording studio with producer Mark Ronson and artist Daphne Guinness at 6 in the morning on Wednesday after a night of writing music. The hitmakers reportedly spent over 12 hours working on tracks for Gaga's upcoming album, which fans refer to as LG5. Mark Ronson is known for his work with Robbie Williams, Christina Aguilera, Adele, Lily Allen, Paul McCartney and many others. He also produced several tracks on Amy Wine