* The United Kingdom seems to have missed on the strange phenomenon that is Train's "Hey, Soul Sister" for the most part—though not entirely. The song peaked at a lowly #18 across the pond, while here in the States it haunted the Top 10 for months (eventually reaching #3), has been certified quadruple Platinum and is the top-selling MP3 of 2010 on iTunes.
* The #1 song on the list didn't reach #1 on the UK chart.
* There are only five entries in the Top 20 of the UK's Top 40 Best-Selling Singles Of 2010 that feature artists from the UK.
* Katy Perry sings on five of the 40 singles, which officially makes her the current consumers' choice for Queen Of Pop overseas. Or just plain evil.
* Two different versions of "Don't Stop Believin'" feature on the list.
* Matt Cardle's "When We Collide" is #20, despite having been released a mere week-and-a-half ago. By the same token, Lady Gaga's "Alejandro"—a song that's been available in the UK for over a year—is #40.
* Three of the songs listed here made it onto Chart Rigger's 10 Best Pop Singles Of 2010 list. Two appeared on the 10 Worst Singles Of 2010 roundup.
* Fucking Iyaz, man...
THE 40 BEST-SELLING SINGLES OF 2010 IN THE UK
1. Eminem feat. Rihanna, “Love The Way You Lie”
2. Bruno Mars, “Just The Way You Are”
3. Usher feat. will.i.am, “OMG”
4. Owl City, “Fireflies”
5. B.o.B feat. Hayley Williams, “Airplanes”
6. Katy Perry feat. Snoop Dogg, “California Gurls”
7. Yolanda Be Cool vs. DCUP, “We No Speak Americano”
8. Helping Haiti, “Everybody Hurts”
9. Rihanna, “Only Girl (In The World)”
10. Tinie Tempah, “Pass Out”
11. Alicia Keys, "Empire State Of Mind (Part II) Broken Down"
12. Rihanna, "Rude Boy"
13. Lady Gaga feat. Beyonce, "Telephone"
14. Plan B, "She Said"
15. Iyaz, "Replay"
16. Cee Lo Green, "Forget You"
17. Taio Cruz, "Dynamite"
18. Flo Rida feat. David Guetta, "Club Can't Handle Me"
19. Jason Derulo, "Ridin' Solo"
20. Matt Cardle, "When We Collide"
21. Glee Cast, "Don't Stop Believin'"
22. Journey, "Don't Stop Believin'"
23. Travie McCoy feat. Bruno Mars, "Billionaire"
24. 3OH!3 feat. Katy Perry, "Starstrukk"
25. Lady Gaga, "Bad Romance"
26. Eliza Doolittle, "Pack Up"
27. Katy Perry, "Firework"
28. Katy Perry, "Teenage Dream"
29. Eminem, "Not Afraid"
30. Tinie Tempah feat. Eric Turner, "Written In The Stars"
31. Timbaland feat. Katy Perry, "If We Ever Meet Again"
32. Sidney Samson feat. Wizard Sleeve, "Riverside (Let's Go!)"
33. Jason Derulo, "In My Head"
34. Scouting For Girls, "This Ain't A Love Song"
35. K'naan, "Wavin' Flag"
36. Ellie Goulding, "Starry Eyed"
37. The Wanted, "All Time Low"
38. B.o.B feat. Bruno Mars, "Nothin' On You"
39. Example, "Kickstarts"
40. Lady Gaga, "Alejandro"