I know Billboard is really choosy on which remixes they feel count towards a featured artist's overall total, but I decided that I'm going to count the remixes which helped the original single peak whether it be the week immediately after its release or months after. The reason I'm sticking with months after is because the remix still helps give the single sales, spins on the radio, and now more streaming points (though, noted, almost all of these remixes predate the incorporation of streaming into the Hot 100). So...
5 Star
Release Date: May 20, 2009
Remix Release Date: November 9, 2009
Peak Date: November 28, 2009
Hello Good Morning
Release Date: March 30, 2010
Remix Release Date: June 29, 2010
Peak Date: July 24th, 2010
Till The World Ends
Release Date: March 4, 2011
Remix Release Date: April 25, 2011
Peak Date: May 14, 2011
Tonight I'm Getting Over You
Release Date: January 21, 2013
Remix Release Date: May 06, 2013
Peak Date: May 25, 2013
The only remix I removed was Hold Yuh since her remix was never released to iTunes.
Obviously I'm still counting Dance (A$$) and Girl on Fire since the remix is what took Dance to the top while Nicki remix of GoF was released together with the solo single. Figuring out whether they should count towards her totals for other Billboard charts (like Hot Rap Songs, Pop Songs, etc.) and international charts will take some time.
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I'm fooling around with using tables, so ignore the style inconsistencies in the OP as of right now.