I think Ellen has had a lot more than that done- maybe not to her face but her body. Remember her tits in Oceans 13 (or whatever version it was) when Matt Damon seduced her? They were standing on their own.
She has always been open about what she has had done to her face. She's fortunate that her face is very round and she has always had big cheeks- that shape holds up well when the face ages.