Lady Gaga Named Most Popular Artist Online

There's no doubt about it, Lady Gaga ruled 2009. From her interesting fashion choices to her erotic dance videos, anything Gaga did we all went Gaga for.

So it should come as no surprise that she was named the most popular artist online. Tracks from her 2008 album, The Fame, were played more than 18.5 million times on leading music site Last.fm.

That's six million more plays than The Killers, who came second in the rundown.

British singer Lily Allen was named the third most popular artist, while the Prodigy was at number four.

Meanwhile, Kid Cudi was dropped from Lady Gaga's Monster's Ball tour after he allegedly punched a fan during a concert.

Sources at Interscope Records confirm the rapper is "no longer" with the tour, but wouldn't say if the decision had anything to do with YouTube footage showing Cudi punching a fan during a tour stop in Vancouver last Friday. But its safe to assume violence was a key factor.

With our without Kudi Lady Gaga is planning on rocking this tour--and we wouldn't expect anything less!