By Keith Caulfield Lady Gaga’s MAYHEM moves in at No. 1 on the Billboard 200 albums chart, as the set debuts atop the tally dated March 22. It’s the seventh leader for the superstar.

Body Dimensions 115.4 x 61.1 x 14 mm, 47.7 cc (4.54 x 2.41 x 0.55 in) ...