"Beauty and a Beat" and "Swim" are No. 1, ahead of "Billie Jean" and "Beat It." Justin Bieber leaves the "Late Show with David Letterman" at Ed Sullivan Theater on June 20, 2012, in New York City. James Devaney/WireImage Trending on Billboard Justin Bieber ’s “Beauty and a Beat,” featuring Nicki Minaj , notches a second week at No. 1 on the Billboard Global 200 , while BTS’ “Swim” rebounds for a fifth week atop the Billboard Global Excl. U.S. chart. Plus, two Michael Jackson classics gain in the charts’ top 10: “Billie Jean” and “Beat It,” sparked by the success of the hit box office biopic Michael . “Beauty and a Beat” holds atop the Global 200 with 59.2 million streams (down 15% week over week) and 2,000 sold (down 18%) worldwide May 1-7, according to Luminate. Bieber played the Coachella Valley Music and Arts Festival in Indio, Calif., on both April 11 and April 18 , with the song, a No. 5 hit on the U.S.-based Billboard Hot 100 in 2013, part of his April 11 set. BTS’ “Swim” holds at No.…