Britney: 15 years (since her debut with BOMT)
Destiny's Child: 9 years (I know them in 2001 with Survivor but I became a fan of them in 2004 with their EPIC comeback with Lose My Breath)
Beyoncé and Kelly of course in the same year.
Lady Gaga: 2008 when Poker Face was out, she slayed me.

I've stanned my #1 girl Miley since 2008.

About two years now.

Never loved an artist more than Madonna.

Ever since I heard her voice on Flo Ridas track Right Round and then when Tik Tok came out so since 2009

Madonna 13 years.
Katy Perry 6 years.
Christina Aguilera 7 years.

Since I saw the premiere of Pon De Replay on tv

Kanye? About a year.
Beatles? About 5 months

Since 2009, so 5 years now.

Janelle- About 8 months
Alecia- 1 year and 2 months

Omg I think I remember that day

3 years

that is seriously so cool

the power of 1D
when i saw them that was it they completely took over my life