Justin Bieber and Hayley Baldwin stroll through London on Monday. Bieber nods a quick "hello" to the filmer, Lizzy. br br "I was walking home from work and spotted several paparazzi in the road," Lizzy said. br br "After walking slightly further, I spotted Justin and Hayley walking towards Holborn!" br br They had been heading there from Chancery Lane. "I walked past them and took a quick video while Justin was singing to himself. I waved at him and he gave me a quick hello! Hayley is here for London Fashion Week.