It's been quite a week for Lady GaGa and Justin Bieber!GaGa's Born This Way continued its reign at #1 for the second week in a row, selling 509,000 tracks, which is a 14% increase from last week's sales.As for The Biebs, his album Never Say Never: The Remixes was #1 on the Billboard 200, with 161,000 copies sold!With the premiere of GaGa's Born This Way music video on its way and The Biebs' Never