Perry has a second song in the mid-year top 10. "Firework" ranks #10. It would have placed even higher but its sales were split between two years. It was the #28 seller of 2010.
Here's the low-down on the 20 best-selling songs for the first six months of 2011.Katy Perry featuring Kanye West, "E.T.," 4,120,000. Perry co-wrote this song, which topped the Hot 100 for five weeks in April and May. It was her fifth #1. The song sold an additional 131K copies in 2010. Adele, "Rolling In The Deep," 4,089,000. Adele co-wrote this song, which topped the Hot 100 for seven weeks, starting in May. It's her first #1. The classy smash is the front-runner to win Grammys for Record and Song of the Year. The song sold an additional 108K copies in 2010. Cee Lo Green, "F**k You (Forget You)," 3,229,000. Cee-Lo co-wrote this rule-breaking smash, which peaked at #2 and won a Grammy for Best Urban/Alternative Performance. It was his best showing since Gnarls Barkley's 2006 smash "Crazy," which also peaked at #2. "F**k You" sold an additional 1,688,000 copies in 2010. It was that year's #46 song. Lady Gaga, "Born This Way," 3,029,000. Gaga co-wrote and co-produced gay-friendly anthem, which topped the Hot 100 for six weeks from February into April. It was her third (and longest-running) #1 hit. Rihanna, "S&M," 2,734,000. This frisky song hit #1 in April, thanks to an assist from Britney Spears. It was Rihanna's 10thsong to reach #1 (and her third in a row). The song sold an additional 107K copies in 2010. Jennifer Lopez featuring Pitbull, "On The Floor," 2,669,000. J.Lo's comeback smash reached #3, her best showing since "All I Have" (featuring LL Cool J) topped the chart in 2003. Pitbull co-wrote the global dance smash, which Lopez promoted on American Idol. The Black Eyed Peas, "Just Can't Get Enough," 2,462,000. This piece of catchy radio fodder reached #3. It was the group's highest-charting hit since their 2009 blockbuster "I Gotta Feeling." The Peas co-wrote "Just Can't Get Enough," which sold an additional 12K copies in 2010. Chris Brown featuring Lil Wayne & Busta Rhymes, "Look At Me Now," 2,442,000. All three artists co-wrote this song, which reached #6. It was Brown's highest-charting hit in three years. It topped the Hot R&B/Hip-Hop Songs chart for eight weeks. Bruno Mars, "Grenade," 2,355,000. Mars co-wrote and co-produced this song, which topped the Hot 100 for four weeks in January and February. The song, darker in tone than Mars' previous hits, was his third #1. "Grenade" sold an additional 2,061,000 copies in 2010. It was that year's #36 song. Pitbull featuring Ne-Yo, Afrojack & Nayer, "Give Me Everything," 2,232,000. Pitbull and Ne-Yo co-wrote this vibrant song, which reached #1 in both the U.S. and the U.K. (A neat trick.) It was Pitbull's first #1 in the U.S. P!nk, "F**kin' Perfect," 2,188,000. P!nk co-wrote this change-of-pace ballad, which reached #2. It was her follow-up to the chart-topping "Raise Your Glass." "F**kin' Perfect" is the second song with the "F word" in its title to rank among the top 20 hits for the year-to-date. And so another taboo falls. The song sold an additional 96K copies in 2010. Ke$ha, "Blow," 2,159,000. Ke$ha co-wrote this pop-dance smash, which reached #7. It was her official follow-up to the chart-topping "We R Who We R." "Blow" sold an additional 59K copies in 2010. Dr. Dre featuring Eminem & Skylar Grey, "I Need A Doctor," 2,071,000. All three artists co-wrote this song, which reached #4. Dre and Eminem had collaborated (along with 50 Cent) on 2009's chart-topping "Crack A Bottle." Bruno Mars, "The Lazy Song," 2,064,000. Mars co-wrote and co-produced this laid-back ditty, which reached #4. It was his fifth top five hit. The song sold an additional 88K copies in 2010. Lupe Fiasco, "The Show Goes On," 2,052,000. Lupe Fiasco co-wrote this zesty song, which reached #9. It's his highest-charting hit to date. "Superstar" (featuring Matthew Santos) reached #10 in 2008. "The Show Goes On" sold an additional 189K copies in 2010. Jeremih featuring 50 Cent, "Down On Me," 2,042,000. The two artists co-wrote this song, which reached #4. This matched the peak position of Jeremih's 2009 hit, "Birthday Sex." "Down On Me" sold an additional 301K copies in 2010. Britney Spears, "Till The World Ends," 1,989,000. This sleek dance smash reached #3, thanks to an assist from Ke$ha (who co-wrote it) and Nicki Minaj. It was Spears' follow-up to the chart-topping "Hold It Against Me." Wiz Khalifa, "Black And Yellow," 1,959,000. Wiz Khalifa co-wrote this instant sports anthem, which hit #1 in February. It was his first Hot 100 hit. The song sold an additional 1,381,000 copies in 2010. It was that year's #58 song. LMFAO featuring Lauren Bennett & GoonRock, "Party Rock Anthem," 1,806,000. This song, which is still climbing the Hot 100, is the first top 10 hit for all three acts. LMFAO consists of the son and grandson of Motown founder Berry Gordy Jr.