The first club play number-one song of the year was claimed by Lady Gaga with "Bad Romance",[1] a position it held in the last week of 2009, thus spending two weeks atop the chart in total.
[8] Australian singer-songwriter Kylie Minogue scored two number one songs with "All the Lovers"[9] and "Get Outta My Way".
[13] Perry attainted three number one songs with "California Gurls", a collaboration with Snoop Dogg,[14] "Teenage Dream",[15] and the promotional single "Peacock".
As well as "Bad Romance", "Telephone" and "Videophone", Gaga also reached number one with "Alejandro".
[17] Rihanna topped the chart with "Russian Roulette",[18] "Hard", a collaboration with Jeezy,[19] "Rude Boy",[20] and "Only Girl (In the World)".