Giggs said: "Cristiano's form, not just this season but the last two, has been unbelievable.
"To top that off his goalscoring record is one of a brilliant centre forward. Hopefully his form and goalscoring form will continue. It is great to have it.
"We have always had a good mix of players at this club who can score.
"Cristiano's all-round game has been brilliant. He attracts two or three players most of the time and that makes space for others."