Also Happening: Chart-Toppers, Latest Leaks, PPL, Facebook, Rapidshare, KCRW, Music Reports, Wall Street

*The top-selling albums for the latest period (US), as counted by Nielsen Soundscan:

Justin Bieber, My World 2.0 (92,129); MGMT, Congratulations (66,231); Lady Antebellum,
Need You Now (65,381); Usher, Raymond v. Raymond (63,601).

*The latest leaks, as dredged by data partner BigChampagne: B.o.B., The Adventures of Bobby Ray (Street 4/27); Bullet For My Valentine, Fever (Street 4/27); Band of Horses, Infinite Arms (Street 5/18).

*London-based licensing group PPL has named Aman Khullar as its new Head of Television Licensing.

*Facebook has now surpassed 400 million users worldwide, up from 350 million in December, per Mark Zuckerberg.

*Rapidshare is saying goodbye to CEO Bobby Chang with “immediate effect and by mutual agreement,” according to the company.

*KCRW has just updated its iPhone app to include features like sharing, bookmarking, and background streaming of stations.

*Rights administration group Music Reports and Audible Magic have joined forces to expand publishing licensing and reporting solutions for a range of clients.

*Wall Street was largely flat on Thursday, though the music portfolio featured some pops.  That included SanDisk (SNDK), up 12.32 percent to $4.22; and Warner Music Group (WMG), up 6.14 percent to $7.78.  Hastings Entertainment (HAST) and Trans World Entertainment Corporation (TWMC) continued with solid gains, but calmed a bit from earlier surges.