'Guns N’ Roses’ former bassist Duff McKagan has become Justin Bieber’s fan after he saw him   performing live.
The 47-year Duff McKagan  was impressed by the teen sensation.

"Do you know what? Justin's a rocker. Man, he actually sings at his gigs, and the band's a real band, and he plays drums and he's really great. Justin Bieber is a rocker for sure," said McKagan.

The 'Velvet Revolver' star who discovered the 'Baby' hitmaker's music through his two daughters is glad to watch his girls' favorite star with them.