Justin Bieber triumphs at No. 1 on the Billboard 200 with "My World 2.0," debuting atop the tally with 283,000 copies sold in its first week . . . The 16-year-old is the youngest male solo artist to notch a No. 1 album since 1963 and on top of that, concurrently charts a pair of top five albums, as "My World" zips from No. 10 to No. 5 this week . . . Monica, a former teen star herself, returns to the Billboard 200 as her "Still Standing" album arrives at No. 2 with her second-best sales week ever (184,000) . . . Two more new sets start in the top 10: the "Now 33" compilation and She & Him's "Volume Two."