1. Here - Alessia Cara
2. All About That Bass - Meghan Trainer
3. Tik Tok - Kesha
4. Baby One More Time - Britney Spears
5. Bring Me to Life - Evanescence
6. Complicated - Avril Lavigne
7. Run It - Chris Brown
8. Just Dance - Lady Gaga
9. What Makes You Beautiful - One Direction
10. Tim McGraw - Taylor Swift
11. I Kissed A Girl - Katy Perry
12. This Love - Maroon 5
13. Rolling in the Deep - Adele
14. One Time - Justin Bieber
15. Genie in a Bottle - Christina Aguilera
16. Just the Way You Are - Bruno Mars
17. Umbrella - Rihanna
This was not her debut song but this was the first song off her second album, "Good Girl Gone Bad" and for me that was when she really came into her own and became a musical force to be reckoned with.
18. Misery Business - Paramore
19. Skyscraper - Demi Lovato
This was not Demi's first debut either, but it was her first debut after coming out of rehab. I feel like she came out of her shell and really shined from this moment on in her career.
20. The Heart Wants What It Wants - Selena Gomez
This was not Selena's first debut but this was the first song that I felt like she was able to put more of her own input into it. And every song she has put out since this one has been a hit. She is definitely going in a better direction in her career.