While Nas achieves his fifth No. 1 album, it's ABBA mania on the charts as the "Mamma Mia!" soundtrack charges at No. 3 on the Billboard 200 with a huge gain. The pop group is also a main attraction on the Top Pop Catalog and Top Cast Albums charts . . . Back on the Billboard 200, John Mellencamp grabs his fourth top 10 debut while country veteran Randy Travis has his best week ever . . . Meanwhile, over on Top Country Albums Taylor Swift monopolizes the top two slots -- the first time any artist has done so since 1997 . . . In Progress Reports, we've got updates on Alan Jackson, Foo Fighters and Menudo.
