Number one shouldn't come as too much of a surprise. 

Regardless of our melodic talents, we're all guilty of turning up the radio and singing along to our favorite jams while driving around in the car. Even James Corden does it, but he takes it a step further by getting famous singers to join in on the fun. Like all good things, the infamous "Carpool Karaoke" sessions started with Mariah Carey last March. And who can forget the time when Corden belted out some old hits from Jenny From The Block with J.Lo, while simultaneously prank texting Leonardo DiCaprio? It's no surprise that these sessions deliver millions of views on YouTube. So buckle your seatbelts and prepare to laugh and sing along to every "Carpool Karaoke" session ever made, ranked in order of hilarity.

17. Christmas Carpool 

16. Chris Martin 

15. One Direction 

14. Mariah Carey 

13. Izzy Azalea 

12. Carrie Underwood

11. Rob Stewart and A$AP Rocky

10. Justin Beiber (After the Grammy's)

9. Jennifer Lopez

8. Jason Derulo

7. Justin Beiber

6. Sia

5. Elton John 

4. Justin Beiber (First Appearance)

3. Stevie Wonder

2. Jennifer Hudson

1. Adele