Mummy's boy: Justin Bieber cuddles up to the woman in his life... mother Pattie

By ANDREA MAGRATH Mother and me: Justin Bieber showed his affection for mother Pattie Mallette as they left the Late Show with David Letterman in New York last nightHe is followed everywhere he goes by crowds of screaming girls, and has flirted outrageously with a series of famous older women including Rihanna, Kim Kardashian and Katy Perry.But last night Justin Bieber reminded everyone exactly...