I know I'm 1 page late, but Whip It is in the top 3 of her best songs, PERIOD.

Top 3: VVV, WI, TMO. WI is perfection. I can tell you why (like I did with HS) but tomorrow cause it's 5:31 AM here.
As far as her pop songs go, I don't use her "pop" pop songs like MM, but for the dance stuff:
Va Va Voom = Whip It > Pound The Alarm > Automatic > Beautiful Sinner > Starships = Masquerade
Masquerade is good but I don't know why I never got into it...
And Automatic is basic but still pretty good. The beat, the chorus, the bridge >>>