Complex sentence: The lead single Alright With Me, was written about Carly's favourite brand of Banana, the Bonita, hence the refrain "Ba-na-na-na-na, Bonita-ba-a-na-na-na".
Split into simpler sentences: The lead single, Alright With Me, was written about Carly's favourite brand of Banana, the Bonita. Hence the refrain, "Ba-na-na-na-na, Bonita-ba-a-na-na-na".