21 May,2013 04:26 AM IST | | IANS
Protesting against the booing, the singer said that he is an artist who should be taken seriously, reports thesun.co.uk.
The 19-year-old competed with singers Taylor Swift and Bruno Mars to grab the Milestone Award, which recognises musical achievements. He was the only under-19 artist with five successful albums.u00a0
Photos: Billboard Music Awards 2013