Her being the first female to have 3 #1 songs in the 90s, 00s, 10s
as well as being somewhere in top 5 females for having #1 songs in 3 decades occurred 5 years ago.
5 years ago (1/29/2011)
Billboard hot 100
1 NE Hold It Against Me - Britney Spears (1st and only week @ #1)
2 1 Grenade - Bruno Mars
3 2 Firework - Katy Perry
4 3 What's My Name? - Rihanna feat. Drake
5 7 Black And Yellow - Wiz Khalifa
6 6 Tonight (I'm F**kin'/Lovin' You) - Enrique Iglesias feat. Ludacris & DJ Frank E
7 4 We R Who We R - Ke$ha
8 5 Raise Your Glass - P!nk
9 8 The Time (Dirty Bit) - Black Eyed Peas
10 9 Just The Way You Are - Bruno Mars