Gratz to Katy but I haven't exactly liked anything by her since Thinking Of You :/
Pink is still the only artist to link 3 consecutive #1s in chart's history though

Who Knew --> So What --> Sober
Rest of the article:
Speaking of P!nk ...
BUBBLING OVER: ... the artist born Alecia Moore could soon reclaim solo ownership of most Adult Pop Songs No. 1s among female artists, as "Raise Your Glass" roars 34-19 as the list's Greatest Gainer.
On Pop Songs, the track charges 34-17, also with Greatest Gainer honors. Up 2,281 plays, "Raise Your Glass" logs the format's greatest weekly increase since Eminem's "Just Lose It" improved by 2,740 plays on the Oct. 9, 2004, chart.
Since 2000, only two other titles have registered loftier one-week gains: 'N Sync's "Pop" (up 2,784, June 2, 2001) and Janet Jackson's "All for You" (up 2,353, March 17, 2001).
"Raise Your Glass" introduces P!nk's "Greatest Hits…So Far!!!," due Nov. 16.