Here are some famous hashtags on TikTok: 1. #ForYou (4.5B+ views) 2. #FYP (3.5B+ views) 3. #TikTok (2.5B+ views) 4. #Love (2.3B+ views) 5. #Dance (2.2B+ views) 6. #Music (2.1B+ views) 7. #Comedy (1.9B+ views) 8. #Beauty (1.8B+ views) 9. #Fashion (1.7B+ views) 10. #Gaming (1.6B+ views) 11. #Life (1.5B+ views) 12. #Fun (1.4B+ views) 13. #Art (1.3B+ views) 14. #Sports (1.2B+ views) 15. #Travel (1.1B+ views) Note: View counts are subject to change and may not be up-to-date. Popular challenge-based hashtags: 1. #Renegade 2. #SavageChallenge 3. #FlipTheSwitch 4. #ToosieSlide 5. #WipeItDown 6. #SaySo 7. #HitOrMiss 8. #BottleCapChallenge 9. #KikiChallenge 10. #MannequinChallenge