Britney Spears has definitely gone all the way. The pop star now boasts the longest span of No. 1 hits on Billboard's Pop Songs chart, as her smash single 'I Wanna Go' moves up to the top position.

With the 'Femme Fatale' song, Spears now has six No. 1s, including her first chart-topper, 1999's '...Baby One More Time.' Her No. 1 run breaks records with a span of 12 years, seven months and four days, reports Billboard.

"Over the last 10 or more years, Britney Spears has had her ups and downs," MoJoe Roberts, program director of Pop Songs panelist KHOP, tells the magazine. "But, every time she drops new music, it is an event for the format."

In addition to 'I Wanna Go' and '...Baby One More Time,' the singer's other No. 1 hits include: 2000's 'Oops!...I Did It Again,' 2004's 'Toxic,' 2009's 'Womanizer' and 'Circus.'

'Femme Fatale,' Spears' seventh studio album, was released on March 25, debuting at No. 1 on US albums charts. The chart-topping entry set another milestone for the mother-of-two earlier this year -- she became the first female ever to have six No. 1 album debuts.