Gloria's from Dreamwork's Madagascar, Gazelle's from Walt Disney's Zootopia and this screenshot's taken from Valve's Garry's Mod.

The pop star of Zootopia was walking around to find herself a new gimmick in order to enjoy entertaining her fans, as usual, until she met Gloria, who then trained her by demonstrating her belly getting big and bouncy by eating lots of fruits. She did so as well and ended just the same. It looks like the hippo lady's glad to have met her new and finest student.