We’re back with the 2018 iHeartRadio Music Awards and our fifth year is going to be no less entertaining than previous ceremonies. With the announcement of the forthcoming show as well as this year’s batch of nominees, we thought it’d be fitting to take a stroll down memory lane and revisit some of the most notable moments from yesteryears. From Rihanna’s trendsetting hair, which went viral on the blogosphere, to Taylor Swift and Madonna’s historic onstage collaboration, there are plenty of highlights to look back on. Scroll on below!

1. 2014: Rihanna's Trendsetting HairPhoto: Brian Friedman for iHeartRadio

2. 2014: Ariana Grande's "Problem" performancePhoto: Getty Images for iHeartRadio

3. 2014: Jared Leto and Billy Ray Cyrus twinning on the red carpetPhoto: Getty Images for iHeartRadio

4. 2014: Gwen Stefani presenting Pharrell with the iHeartRadio Innovator AwardPhoto: Getty Images for iHeartRadio

5. 2014: Austin Mahone Accepts the Instagram AwardPhoto: Brian Friedman for iHeartRadio

6. 2014: Usher's Tribute to Michael JacksonPhoto: Getty Images for iHeartRadio

7. 2014: Pitbull and G.R.L.'s Performance on a BoatPhoto: Getty Images for iHeartRadio

8. 2015: Cameron Dallas and Shawn Mendes

Photo: Getty Images for iHeartRadio

9. 2015: Iggy Azalea and Jennifer Hudson Getting in "Trouble"

Photo: Getty Images for iHeartRadio

10. 2015: Rihanna's Big Entrance for B*tch Better Have My Money"Photo: John Shearer for iHeartRadio

11. 2015: Chris Brown and Jamie FoxxPhoto: John Shearer for iHeartRadio

12. 2015: Nick Jonas and Chris BrownPhoto: Getty Images for iHeartRadio

13. 2015: Madonna and Taylor Swift Collaboration

Photo: John Shearer for iHeartRadio

14. 2015: 5SOS Accepting the Best Fan Army AwardPhoto: Brian Friedman for iHeartRadio

15. 2015: Left Shark and Ian ZieringPhoto: Getty Images for iHeartRadio

16. 2015: Taylor Swift's Reaction to Winning the Best Lyrics AwardPhoto: Getty Images for iHeartRadio

17. 2015: Justin Timberlake Accepting the iHeartRadio Innovator Award from Tom FordPhoto: Getty Images for iHeartRadio

18. 2015: Taylor Swift Winning BigPhoto: Getty Images for iHeartRadio

19. 2016: Diplo, Justin Bieber and Big Sean Hanging BackstagePhoto: Getty Images for iHeartRadio

20. 2016: Jason Derulo HostingPhoto: Brian Friedman for iHeartRadio

21. 2016: Bono and The Edge Accepting the iHeartRadio Innovator Award from PharrellPhoto: Getty Images for iHeartRadio

22. 2016: Taylor Swift Accepting the Best Tour Award from Justin TimberlakePhoto: Getty Images for iHeartRadio

23. 2016: Calvin Harris and Taylor Swift Showing Some PDAPhoto: Getty Images for iHeartRadio

24. 2016: G-Eazy and Bebe Rexha Performing "Me, Myself & I"Photo: Getty Images for iHeartRadio

25. 2016: Nile Rodgers Joins DNCE OnstagePhoto: Getty Images for iHeartRadio

26. 2016: Demi Lovato and Brad PaisleyPhoto: Andrew Swartz for iHeartRadio

27. 2016: ZAYN Makes His Solo Award Show Performance DebutPhoto: Getty Images for iHeartRadio

28. 2016: Justin Bieber Runs Through the Crowd During "Company"Photo: Andrew Swartz for iHeartRadio

29. 2016: Selena Gomez and Taylor SwiftPhoto: Getty Images for iHeartRadio

30. 2016: Iggy Azalea and Demi Lovato Hanging BackstagePhoto: Getty Images for iHeartRadio

31. 2016: Selena Gomez and PharrellPhoto: Getty Images for iHeartRadio

32. 2017: It was a family affair for the Cyrus'.Photo: Getty Images for iHeartRadio

33. 2017: Labrinth and Noah Cyrus Performed "Make Me (Cry)"

34. 2017: The Chainsmokers performed "Something Just Like This" with Chris Martin

35. 2017: Katy Perry and Skip Marley were "Chained to the Rhythm"

36. 2017: Ed Sheeran won Best Lyrics for "Love Yourself" -- but he also performed "Shape of You" and "Castle on the Hill" Photo: Andrew Swartz for iHeartRadio

37. 2017: Shawn Mendes begged for "Mercy"Photo: Andrew Swartz for iHeartRadio

38. 2017: Big Sean brought the movesPhoto: Brian Friedman for iHeartRadio

39. 2017: Thomas Rhett brought his living roomPhoto: Andrew Swartz for iHeartRadio

40. Bruno Mars took home the Innovator AwardPhoto: Florent Déchard