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.
Photos: Billboard Music Awards 2013
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Spotted: Alia Bhatt, Ranveer Singh, Neha Dhupia in Bandra