irst No. 1 single and Grammy After being featured in a prominent Calvin Klein ad, Bieber was able to make a big comeback in 2015, nailing a summer Top 10 hit with the Diplo and Skriliex collaboration"Where Are U Now Then in October, Bieber landed his first No. 1single with"What Do You Mean? with both tracks helmed by R&B songwriter Poo Bear. The foliowing year, Bieber landed his first Grammy, winning for where Are U Now" in the category of Best Danc recording