Guess who is the top pop artist of the last 20 years? Tue-09-Oct-12 10:11 Share this Tell Us What You Think WTF 0 LOL 0 FAIL 0 OMG 0 HOT 0 CUTE 0 ] By Jay-Jay FeeneyRIHANNA is stoked to be announced as Billboard.com’s top pop artist of the last 20 years.She tweeted: "Billboard crowned me #1 top 40 artist of the decade just 7 years into this!!... HistoRIH."Pink was second and Britney Spears third, Kelly Clarkson fourth and Mariah carey fifth. You May Also Like 15 top celebrity Instagram moments of 2014 2 awesome collaborations we can't wait for 7 other celebrity diva moments A celeb said they were dating Rihanna so she SHUT HIM DOWN Become a fan of The Edge on Facebook and on Twitter .