I think a big part of FF underwhelming sales are her awful performances. I mean... they were just terrible Both promo and tour performances. When the FFT started she was putting effort into the performances IMO. Slave was like a throwback cuz it had the original choreography and then... 10 dates in she was already lazy I mean, she wasn't even energetic here in South America and it's the first time she tours here, like...bitch MOVE.
1. TAYLOR SWIFT – I Knew You Were Trouble: 186.574 (-1.711)
2. MACKLEMORE & RYAN LEWIS – Thrift Shop f/Wanz: 170.542 (+0.026)
3. SWEDISH HOUSE MAFIA – Don’t You Worry Child: 156.607 (+0.412)
4. BRUNO MARS – Locked Out Of Heaven: 154.026 (-1.918) 5. MAROON 5 – Daylight: 143.930 (+1.810) ▲
6. WILL.I.AM & BRITNEY SPEARS – Scream And Shout: 143.446 (-0.321) ▼ 7. JUSTIN TIMBERLAKE – Suit & Tie: 129.192 (+2.500)
8. LUMINEERS – Ho Hey: 123.822 (-0.274) 9. BRUNO MARS – When I Was Your Man: 113.219 (+2.494)
10. CALVIN HARRIS – Sweet Nothing f/Florence Welch: 104.860 (+0.357)
I would hurt myself if Ke$ha were a featured artist on the new album. Her voice degrades everything it touches (Britney's does the opposite, as proven by that remix of 'Till The World Ends.') She's also an offensively bad writer. 'Till The World Ends' was decent because of everyone else. She was credited last. She probably wrote like one line or something.
Both promo and tour performances. When the FFT started she was putting effort into the performances IMO. Slave was like a throwback cuz it had the original choreography 
and then... 10 dates in she was already lazy 
