Sure, here are some popular songs and covers by Usada Pekora:

1. "Renai Circulation" (Bakemonogatari opening theme)

2. "Dango Daikazoku" (Clannad ending theme)

3. "Kiss Me" (Carole & Tuesday ending theme)

4. "Kimi no Shiranai Monogatari" (Bakemonogatari ending theme)

5. "Kokoronashi" by Hanatan

6. "Kimi no Toriko" by RAPBIT and Puni-chan

7. "Ama no Jaku" by 164 and GUMI

8. "Hibana" by DECO*27 and Hatsune Miku

9. "Lost One's Weeping" by Neru and Kagamine Rin

10. "Kusare Gedou to Chocolate" by Pinocchio-P and Hatsune Miku

These are just a few examples, as Pekora has covered many songs and has a wide range of musical interests.