PRISM sold 3.5M as of May 2015. No idea how she managed to sell 2.5M in 4 months with no single.
Plus, Teenage Dream is at like 6.5M.
No idea why y'all find the need to inflate sales, her sales are commendable. 3.5M in todays climate is amazing.
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Gaga, obviously yes. Lily, nope. She has sold around 5M albums, which is amazing for a UK artist. She has 2 1M selling albums in the UK.