
at Katy's inflated sales.

at Gaga's deflated sales.

at Katy needing TEA to even be close to Gaga's pure album sales.
But no, she won't. Katy is currently on her way out as proven by the lackluster sales of PRISM, the last two singles from the album flopping, the media ignoring her, people ignoring her, award shows ignoring her. As of right now, all she has is touring (which she still lacks when it comes to Gaga). Gaga on the other hand has proven her longevity after winning her sixth Grammy seven years into her career and this year being one of her best since, like, 2010. Unless Katy goes through a massive image overhaul like Gaga is doing right now, which she won't since her label won't let her, she won't last much longer. She's a singles artist without impact and those kinds of artists are hot for a little while but are ultimately forgotten.
Plus album sales are falling every year so Katy will need three or four more albums to reach where Gaga is now.