"Ghost Girl" is a featured song in the episode "Buckets". It's split into three parts and a reprise. All three parts and the reprise are sung by Ghost Girl: the first time when she emerges from her portrait after being seen by Grumpy and its reprise when her voice is overheard by the 6D and Lord Starchbottom, the second time she meets Grumpy in the kitchen, and the third time when she contributes haunting lyrics to a soothing lullaby sung by an unsuspecting Happy.