Katy Perry in the music video for Last Friday Night (T.G.I.F.), featured in DJ Earworm's annual United State of Pop mash-up. (PHOTO: Screen Capture / YouTube / DJ Earworm)

Pop music in 2011 was all about Katy Perry and her number one singles.

DJ Earworm, mash-up master, has combined the top 25 songs of the year in his annual United State of Pop jingle. This year, the theme is World Go Boom, led by the bridge from Perry's hit, Firework.

2011 gave us songs of regret and anger, pride and perseverance, and lots of fire. When someone's taken everything from you, what do you do? DJ Earworm, wrote on his blog on Dec. 25.

The 2011 mix features three hits from Perry (Firework, E.T., Last Friday Night), as well as two singles each from Adele, Bruno Mars, LMFAO and Rihanna. There are also some of the year's other movers and shakers, including Cee Lo Green (F--- You!), Lady Gaga (Born This Way) and Nicki Minaj (Super Bass).

Perry, 27, has had quite the year, thanks to her third studio album Teenage Dream. The singer is on pace to beat Michael Jackson's longtime record for having the most number one singles from the same album on the Billboard Hot 100 chart. If Perry's latest, The One That Got Away reaches the chart's top spot, the song will be the sixth number one hit from Teenage Dream.


A screen capture from DJ Earworm's audio and video mash-up of the year's best in pop music. (PHOTO: Screen Capture / YouTube / DJ Earworm)

Now in its fifth year, the United State of Pop mixes the most popular pop tunes of the year in both audio and video form. The 2011 version, however, is based on a new set of rules.

I've made some changes in the song selection process this year. In efforts to better reflect the year, I have a system that draws from the weekly charts from throughout 2011 that ensures that all late-breaking hits are included in the 2011 mix, wrote DJ Earworm, whose real name is Jordan Roseman.

Since 2008, the mash-up has been based on the Billboard Hot 100 chart's top 25 hits of the year. Past mixes have gained DJ Earworm millions of views on YouTube, including 2009's Blame It on the Pop, which was viewed by more than 40 million people.

Here is the complete list of the top 25 songs of 2011, according to DJ Earworm's annual United State of Pop mash-up. Scroll down for the music video to World Go Boom.

Rolling In The Deep - Adele

Someone Like You - Adele

Just Can't Get Enough - Black Eyed Peas

Grenade - Bruno Mars

The Lazy Song - Bruno Mars

Till The World Ends - Britney Spears

F--- You! - Cee Lo Green

Tonight (I'm Lovin' You) - Enrique Iglesias

Pumped Up Kicks - Foster the People

On The Floor - Jennifer Lopez

Down On Me - Jeremih feat. 50 Cent

Firework - Katy Perry

E.T. - Katy Perry

Last Friday Night (T.G.I.F.) - Katy Perry

Born This Way - Lady Gaga

Party Rock Anthem - LMFAO

Sexy and I Know It - LMFAO

The Show Goes On - Lupe Fiasco

Moves Like Jagger - Maroon 5

Super Bass - Nicki Minaj

Good Life - OneRepublic

Raise Your Glass - Pink

Give Me Everything - Pitbull

S&M - Rihanna

We Found Love - Rihanna