u/Disastrous-Lemon-150

I ised to play this computer game constantly and I cannot for the life of my find it. It was a house with a little cartoon monster as the main character, I feel like he was yellow but maybe not. Every room of the house had different activities, like I think one room was setting up for a party - but the one i very vividly remember is the basement room where you gave the monster a sort of makeover. He was wearing a bathrobe i think, and he sang “I feel pretty, oh so pretty!” during the scene.
Unfortunately I don’t remember any other major details