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Full-frontal nudity, incest jokes, expletives, unexpected political protests and . . . Rob Lowe and Snow White?

The 84th Annual Academy Awards, which go down in Los Angeles this Sunday, could by without a hitch -- but hopefully not!

PHOTOS: CHECK OUT US' GALLERY OF BIGGEST OSCAR GAFFES EVER!

The history of the biggest, most-anticipated night in Hollywood is littered with unscripted, awkward and just plain bizarre moments broadcast to movie fans worldwide.

Back in 1969, Barbra Streisand had her own wardrobe malfunction with an accidentally see-through suit; five years later, presenter David Nivens cheekily dealt with a completely nude male streaker (peace-sign flashing David Opel) bum-rushing the stage.

Certain Oscar winners made their own victorious moments oddly unforgettable -- including political protesters Marlon Brando and Vanessa Redgrave, not to mention Sally "You Really Like Me!" Field and a young Angelina Jolie, who thanked her brother/date James Haven with, ahem, lots of affection.

What's the biggest Oscar gaffe of all time? Check out Us Weekly's gallery and tell Us!