VIDEO : Adrienne Bailon, Rob Kardashian's Ex, Happy About Engagement

Since Blac Chyna and Rob Kardashian are engaged, E! News wanted to know how their respective exes felt about the engagement. Tyga, the exboyfriend and father of Chyna's son, has already tweeted his well wishes. One of his tweets said:"It makes me happy to see the mother of my son happy.My only concern in this situation is my son. I want him in happy environments.