Michael Buble and Luisana Lopilato in London Pictures

Michael Bublé and his wife, Luisana Lopilato, were hand in hand for a stroll in London last night. Michael's been in the UK doing press for his new book, Onstage, Offstage, and he met with fans at an event last week at Waterstones. His new memoir isn't the only project Michael is promoting, since he also has his Christmas album coming out on Oct. 24. He told us about working on holiday songs with Shania Twain for the CD when he was in Napa this Summer and also shared his excitement over one day starting a family with Luisana. The couple, who were married in March, aren't expecting yet since Michael said he wants to wait until Luisana is ready to have kids.