Because this hasn't been done to death already rofl

"Babs Seed is introduced in One Bad Apple. She arrives at the Ponyville train station, where Apple Bloom introduces her to the other Cutie Mark Crusaders, who then show her the clubhouse and their giant pumpkin float for the Summer Harvest Parade. Diamond Tiara and Silver Spoon arrive shortly after and berate Babs for not having a cutie mark, which she seems self-conscious about. Ultimately, Babs makes fun of the Cutie Mark Crusaders, wrecks their float, and joins Diamond Tiara and Silver Spoon, Diamond Tiara commending Babs' "big city attitude". She then spends much of her time tormenting the Crusaders, who are scared of being "snitches" if they tell Applejack; the song, Babs Seed, from the episode depicts Babs chasing and bullying the Cutie Mark Crusaders. She even kicks them out of their clubhouse, forcing them to resort to drastic measures: Booby-trapping a float and enticing her to ride it herself in an attempt to ultimately humiliate her."