Katy Perry is getting ready for her world wide, 'Prismatic' tour but has an accomplishment to celebrate before she opens her live show. Perry has tied Rihanna for the most No. 1s in the 21-year history of Billboard's top 40-based pop songs on the radio.

With her hit "Dark Horse" Perry now has 11th No. 1's under her belt,
Billboard reported.

Rihanna had moved ahead of Perry when her single with Eminem topped the charts with "The Monster," but Perry answered back quickly with her dance track that features Juicy J.

Back in 2008 was the first time that the "Roar" singer topped the charts, with "I Kissed A Girl."

A few other females hold top honors for their singles as well including, P!nk with nine pop songs at the top spot and Lady Gaga with seven.

CNN reported that Perry is also the most followed celebrity on Twitter. Her fan base is clearly only growing and fans are enjoying her latest album which features, "Roar" and "Dark Horse."

Listen to "Dark Horse" here:

image: Wikimedia Commons