1. U.S. via Australia summer-dominator Iggy Azalea teams with British hit-writer Charli XCX for gum-smacking anthem, "Fancy."
2. U.K. group Clean Bandit's totally irresistible fusion of violin and house, "Rather Be."
3. Dutch singer and rapper Mr. Probz' gravelly earworm, "Waves."
4. Zhang Wei and Isabelle Huang Ling's "High Song (Mountain Top)," the song every tween and grandmother in China knows.
5. Canadian diva Kiesza's shiny, stripped-down '90s dance throwback, "Hideaway."
6. Australian boy band 5 Seconds of Summer's scream-along, "She Looks So Perfect."
7. Norwegian duo Nico and Vinz' sangria-flavored courtship jam, "Am I Wrong."
8. American mini-Mariah Ariana Grande's klezmer bop tell-off, "Problem."
9. Brazilian singer Psirico's next-level sax jam, "Lepo Lepo."
10. Powerhouse British crooner Sam Smith joins producer Naughty Boy for "La La La," a 2013 sing-along that's still picking up steam.
11. Enrique Iglesias' 25th No. 1 single on Billboard's Hot Latin chart, "Bailando," is a remake of a 2013 hit by Cuban artists Descemer Bueno and Gente De Zona.
12. Swedish EDM star Avicii teams with American bluegrass singer Dan Tyminski for "Hey Brother."
13. Dutch DJ Tiësto's "Wasted," this summer's chilled-out version of "I Love It."
14. German folk rock duo Milky Chance's plucky head-nodder, "Stolen Dance."
15. British electropop duo La Roux's comeback epic, "Let Me Down Gently."
16. Colombian singer J. Balvin and Puerto Rican singer Farruko try to remember the night before on shimmering reggaeton jam "6AM."
17. South Korean boy and girl group Akdong Musician's doo-woppy ode to crushing hard, "200%"
18. Mexico's Banda El Recodo de Cruz Lizarraga regret infidelity over trombone on "Consecuencia de mis Actos."
19. Trinidadian soca king Machel Montano's no-stress anthem, "Happiest Man Alive."
20. "Some," a heavenly boy/girl R&B duet from South Korea's Junggigo and Soyou.
21. Guatemalan singer Ricardo Arjona's tear-inducing ballad, "Apnea."
21. Nigeria's identical twin stars P-Square recommend saving for rainy days on jubilant "Taste the Money."
22. South African band of brothers Kongos' bluesey squall, "Come With Me Now."
23. "Coastline," dreamy psychedelia from California-via-Australia band Wunder Wunder.
24. Australian Rihanna songwriter Sia's keep-this-one-for-myself anthem, "Chandelier."
25. Souped-up deep house from Dutch producer Oliver Heldens and British singer Becky Hill, "Gecko (Overdrive)."
26. British megastar Ed Sheeran returns, this time with Pharrell, on "Sing."
27. Mexico's Banda MS sing earnestly about a love that's so good it cool like a breeze on "Hermosa Experienca."
28. Brazilian singer Anitta's acoustic guitar flirting song, "Zen."
29. "House Party," a cookout jam from American college football player turned country upstart Sam Hunt.
30. Belgian DJ Robert Abigail's World Cup-celebrating ode to summer drinking, "Mojito."
31. Helene Fischer's German club smash, "Atemlos Durch die Nacht."
32. U.K. boy group Rixton's "Me and My Broken Heart," a bouncy 2014 update of Rihanna's "Unfaithful."
33. British producer Palmistry's balmy cool-down, "Catch."
34. Brazilian singer Lucas Lucco's piano ballad about last-forever love, "Mozão."
35. U.K. duo Sigma's drum and bass interpolation of Kanye West's "Bound 2," "Nobody To Love."
36. Turkish pop diva Gülşen's Ibiza-ready "İltimas."
37. Norwegian producer Kygo remixes Ed Sheeran on "I See Fire."
38. Danish badass MØ's high-octane Spice Girls cover, "Say You'll Be There."
39. Drake's favorite Jamaican dancehall singer Popcaan hollers at club queens on "Luh Ya Bad."
40. Canadian band Magic! brings back soft-ska on "Rude."
41. New Zealand brother/sister duo Broods' "Bridges" lays feathery vocals over super-thick bass.
42. Canadian singer Cooper's motivational stairmaster soundtrack, "This Year."
43. Nigerian singer Davido croons about a rich-meets-poor love on "Aye."
44. Japanese group Sekai No Owari's Burning Man-ready march, "Hono To Mori No Carnival."
45. "Drop the Game," a spooky ballad from Australian electronic guys Flume and Chet Faker.
46. Flume's thwacking speaker-breaker, "Holdin On."
47. Colombian idol Juanes' handclap-driven "La Luz."
48. London producer TĀLĀ's distorted, thumping "The Duchess."
49. Takako Matsu's Japanese version of, "Let It Go," "Ari No Mamade."
50. Irish singer Hozier's grimy spiritual, "Take Me To Church."
51. Spanish rapper Mala Rodriguez spits truth on "Caja de Madera."
52. Uruguayan cumbia from Ej Reja and El Gucci, "Rompe La Barra."
53. New York via Jamaica singer Kranium's slow-wind essential, "Nobody Has to Know."
54. "Travesuras," a smooth booty-popper from Puerto Rican singer Nicky Jam.
55. Lebanese electro-pop singer Yasmine Hamdan oozes cool like Lana Del Rey on "Enta Fen, Again."
56. Puerto Rican rappers Yandel and Daddy Yankee join forces on super aerobic "Moviendo Caderas."
57. Protoje and Chronixx lead Jamaica's roots reggae revival with "Who Knows."
58. British teen prodigy MNEK's soulful thumper, "Every Little Word."
59. Belgian pop chameleon Stromae's twisted cabaret banger, "Tous Les Mêmes."
60. Australian singer/songwriter Vance Joy's reedy, hopeful love song, "Riptide."
61. U.K. girl group Juce put fools on blast over vintage drum machines on "Call You Out."
62. Puerto Rican super-trio Wisin, J.Lo, and Ricky Martin's steamy triumph, "Adrenalina."
63. Scottish superstar DJ Calvin Harris' pool party starter, "Summer."