B.B.B.F.F. (Big Brother Best Friend Forever) is a song that is featured in the episode A Canterlot Wedding - Part 1. Twilight Sparkle first sings it when she explains to her friends that her brother, Shining Armor, was the only pony she trusted as a friend before she was sent to Ponyville. Later in the episode, when she was afraid she had "lost a brother" because of an argument, she sings a somber, much shorter reprise. The song is notable in being Twilight's first solo song. Meghan McCarthy stated that she was inspired by the relationship her daughter has with her older brother.