Woops forgot mah break (click read more)
Friendship is Magic part 1/2
Benny Hill scene.
Bunny scene = Night of the Lepus. Also, cow lady may be a Fargo reference.
Bonanza Theme during the Cow herding segment (Here)
Apocalypse now "The HORROR", OPPP
Griffon the Brush Off
Dash trying to escape Pinkie is a Pepe Le Pew routine.
Pinkies Flying Machine is similiar to The Fantabulous Contraption of Dr Horatio Hufnagel
Porky Pig spike with the hiccups
Snips and Snails do a Pinky & The Brain joke.
A-team/Charlies Angels references
Feinting goat ponies all over the place
Swarm of the Century
Twilight wanting to make a duplicate Ponyville is a joke from Blazing Saddles.
Star Trek Tribble Parasprite sound effects.
Spike has a yellow parasprite (spyro reference)
Scooby Doo style Pinkie pie cake eating.
Look before you Sleep
"Everything you Always Wanted to Know About Sleepovers (but Were Afraid to Ask)" from Look Before You Sleep is a play on the book "Everything you Always Wanted to Know About Sex (But Were Afraid to Ask)" (woah seriously?)
Winter Wrap Up
Call of the Cutie
Rocky Montage References
Tennis Pony is a Reference to Andre Agassi
Fall Weather Friends
Twilight is #42, and Dash jokes about the book "Egghead's Guide to Running" = Hitchhiker's Guide to the Galaxy reference.
Suited For Success
Rarity's wallowing scene is straight from an old Greta Garbo movie, "Grand Hotel."
Hoity Toity = Karl Lagerfeld
"Art of the Dress" is based off of this "http://www.youtube.com/watch?v=-836TtoF_5I"
Feeling Pinkie Keen
Flaming-Twilight looks suspiciously like a Rapidash
"Wide, wide world of Equestria" is a blazing saddles reference
Ghost Busters Brain scan Machine!
Twilight jumping on the soap box for her anti-psychic speech.
Gradius music for the Coliseum
Rarity flying to the sun is a reference to Icarus in Greek mythology.
Swan lake song during Rarity/Rainbow Dashes Flight show.