I was going to post this on the One On One board, but that board is dead, so I will post it here, and in a way it does have something to do with the show Moesha.
Ray J. currently is on the show One On One, along side Kel Mitchell.
On Mitchell's old show Kenan & Kel, in Kenan's bedroom there are a couple of posters / pictures of Brandy.
Also, both Brandy and Ray J. were musical guests on Mitchell's other old show All That. In a 1999 / 2000 interview, when asked about his all time favorite musical guests on All That, Kel said Brandy was one of his favorites.