Credit: Jeffrey Mayer/; Steve Granitz/

No war of the blondes here, folks!

Reese Witherspoon surprised fans with a not-so-sunny rant about Hollywood celebs while accepting a Generation Award at the MTV Movie Awards in L.A.

After complaining about "bad girl" stars with sex tapes and reality shows, the actress, 35, cautioned her female peers: "If you took naked pictures of yourself on your cell phone, you hide your face, people! Hide your face!"

Some wondered whether the crack was a dig at Blake Lively, the subject of an alleged nude photo scandal that hit the web last Tuesday.

"Reese was absolutely not referencing Blake Lively," Witherspoon's rep told Us Weekly Monday.

After nude pics purporting to be of the Gossip Girl actress, 23, surfaced online last week, Lively's rep told Us the pics were "100 percent fake," and that she would sue any publication that reprinted the photos.