Martin talks about being 75, going to the Golden Globes with Steve Martin, accidentally cutting Selena Gomez and Benny Blanco's wedding cake before they did, season five of 'Only Murders in the Building,' touring with Steve Martin, his new Netflix documentary called 'Marty, Life is Short' and whose side he would be on between the U.S. and Canada. Watch 'Jimmy Kimmel Live!' WEEKNIGHTS 11:35/10:35c on ABC. Stream on Hulu.