my favorite mac collection of all time has to be the the Heatherette one. def glamorous and out there and i love it. Reminds me of their makeup on their runway shows.

bbr collection and syle warriors

I'd have to say Hello Kitty because it's the first that comes to mind. But I love them all! So hard to pick one! :)

Hi again! I just loved the Fafi collection for the packaging for and the quads!

Definitely the Mac X Hello Kitty collection. When that came out in spring I just had to get my hands on it.It's sweet and innocent with a bite, features a wide range of tempting palettes with the most playful titles..who says good girls can't have fun too?;)

Rose Romance!! :)

mine hands down has to be hello kitty!!!

Hello Kitty for sure :)

My favorite collection was Style Black... I loved everything about it!

I like their Rose Romance collection!

my favorite collection of all time is style black :D twitter: HynaffiT

MY favorite Mac Collection would be the Hello Kitty Collection. That's when I started following your blog and really getting into makeup ;)

This is such a hard decision. But I think "A Rose Romance" is my favorite collection. I got the entire collection. Each of my friends got me something for my brithday. I didn't even know about the collection, until I opened up my gifts. But I fell in love with everything! :) Twitter: http://twitter.com/SingNightingale

Love that Look --> for those lovely Starflash eyeshadows... OR Makeup Art Cosmetics --> for its amazing and beautiful pigments I don't know which to choose as best one >_<

Red She Said was my favorite. I think I bought everything from it. Every other day, I was at MAC buying something. :) On twitter, I am LatinaSamantha.

The Naughty Nauticals Collection was my favorite. Just for the eyeshadows. Some of those colors are so beautiful! Twitter: RachaelBlueEyes

The 2008 Holiday collection was my favorite. I bought the pigments and I was so happy with them! My twitter username is KickinUpHerHeel.

My favorite was Fafi. I think it was more for the small dolls than the makeup though. :) Twitter: NatBug82

Barbie, hands down Barbie was my favorite collection. My twitter name is CountryGalThea.

Hello Kitty was my fav! I have always liked Hello Kitty. Put it in makeup form, and I was in love. http://twitter.com/HowAboutTeresa

C-shock! barbie loves mac comes in a close second though. :) twitter: phelish

Royal Assets is my favorite. I was able to buy back up products in Las Vegas after the collection came out. I am so glad that I went to the CCO that day! (FashionistaCole)

My favorite collection is the Antiquitease collection. There were some fun things in that collection. :) Twittername: Gabis_Love

hello kitty collection was my favorite and i got almost everything from that collection...thats like the only collection that i got excited over a lot and bought pre-sale cuz i was scared that they will run out...lol but the lipglosses from the HK collection are too sticky....i love beauty powder and blush from that collection.....

Fav collection of all time HAS to be HELLO KITTY! I mean really. Hello Kitty? Cutest thing ever <3 MAC makeup? Best quality ever. Combined? You cannot get any better than that! twitter name: hanahime tweeted here: http://twitter.com/hanahime/status/5968885595

My favorite collection would have to be the Starflash collection. I just fell in love with the eyeshadows. Blending them is so easy! (TheMariachiWife)

I know it is going to sound crazy. But the packaging sold me on this one. Neo Sci Fi is my favorite. (CrazyJelly78)

I am such a 5 year old!!! But from the time I heard about it, my favorite has been the Barbie Collection. My twitter name is AlicePsPalace.

The Barbie Collection was my favorite. It was when I was getting into MAC. I even think it was the first collection that I bought from. On twitter, I am MommaStephanie.

i'm new to mac, but so far my favorite collection has been the hello kitty collection :)

Hello Kitty was my favorite collection! http://twitter.com/PerfectMomma

I HEART the Barbie Collection! It made me feel like a little girl again! I wish they would do something like that again!!! Twitter: MaggiesHeart

My fav is the mac minealize skin finish natural. I like the heatherette collection and the hello kitty.

hands down style black was my favorite! i'm whosgotbigds on twitter.

Fave of all time: Dame Edna. Kanga Rouge is the perfect red and Possum-nose Pink is my fave gloss ever.

Wow, this is hard. But I think I will go with the Barbie Collection. It was the first collection that I just had to have everything! Twitter: HisLittleDevil

As a MUA, Colour Craft was my favorite. Personally, I liked Rose Romance. Twitter: MandersinLove

My favorite collection was the Starflash collection. The shadows were just so pretty. The texture was amazing too! My twitter name is Mamaof4Hearts. :)

The Sugarsweet Collection or the Magic, Mirth and Mischeif 09 holiday collection!

I just loved the Sugar Sweet collection! It was so much fun! My twitter username is AnnaMarieNM80.

Rose Romance, I think that is the name of the collection. It was just so beautiful. The colors that I absolutely LOVE to wear! Twitter: KateaSimpleGal

The Sugar Sweet collection was my absolute favorite collection! My twitter username it ItalianHotAva.

Im DancingAnnie80 on twitter. My favorite was the Hello Kitty. I couldnt resist the packaging!

The Naked Honey collection was my favorite. There were so many products that I really enjoyed! On twitter, I am SoyMoniMoni.

I liked the Rose Romance collection. The colors were just beautiful! Twitter: HealthNut2006

Hello Kitty or Style Black. :)

I cant lie, I LOVE the Starflash collection! I managed to buy all the eyeshadows. On twitter, my username is BurqueSara. :)

Hello Kitty for sure :)

My favorite was the 2007 Holiday collection. I just liked the colors and the products. (GabesMorenita)

I retweeted your giveaway too.