Rihanna is closing out the year with some extra zeroes in her bank account. The pop superstar’s “LOUD” tour was among the top 10 tours of the year, grossing a whopping $90 million. The international trek, which wrapped before Christmas, lands at No. 7 on Pollstar’s Top 25 Worldwide Tours of 2011. The “We Found Love” singer played 99 shows in 78 cities and averaged $75 per ticket during the six-month-long jaunt, which hit North America, South America, and Europe. RiRi tops fellow pop acts including Britney Spears, Justin Bieber, Lady Gaga, and Katy Perry. Other artists making the list include Usher, whose “OMG” tour raked in $59.1 million. Meanwhile, Jay-Z and Kanye West’s Watch the Throne outing grossed $48.3 million with only 35 shows. See the full list of top-grossing worldwide tours below.