5. "I See Fire" by 2Pac ft. Notorious B.I.G., DMX & Ed Sheeran
10. Maroon 5 vs. Katy Perry: "Sugar" vs. "Birthday" (basically the same song... and that's a good thing, I think)
13. Nicki Minaj vs. Ke$ha: "Die Young" vs. "The Night Is Still Young" (my liiiiife)
14. Natalie La Rose vs Major Lazer: "Somebody" vs. "Lean On" (basically everything sounds good with "Lean On")
16. "Whistle FourFiveSeconds": Rihanna vs. Flo Rida (inspiring)
17. "Umbrella Worth It": Rihanna vs. Fifth Harmony (also inspiring)
22. Marvin Gaye "Let's Get It On" vs. Ed Sheeran "Thinking Out Loud"
23. "Pretty Hollaback Girls": Britney Spears vs. Gwen Stefani
24. Fifth Harmony vs. Taylor Swift: "Bloodhammer" (great name for a mashup)
25. "Ayo Bitch Better Have My Money": Rihanna vs. Chris Brown/Tyga (anything mashed up with "Bitch Better Have My Money" feels better than the original)
26. Taylor Swift vs. Fallout Boy: "I Knew You Were Trouble" vs. "Centuries" (So many Taylor mashups)
28. "Numb Heart": Linkin Park vs. Sia (bless the person who thought of this one)
29. "Talking Lies": Tove Lo vs. Marina & The Diamonds (perfection tbh)
30. "Dear Future Husband, I'm Yours": Meghan Trainor vs. Jason Mraz (ukelele bb)
31. "So Happy I Could Die" vs. "Lean On": Lady Gaga vs. Madeon (4 the gym)