Charade
the Wedding Singer
Intolerable Cruelty
Notting Hill

Yes, especially North By Northwest. Stunning comedy.

I'd say:

Notting Hill
Only You
My Best Friend's Wedding
You've Got Mail
Sweet November

Shallow Hal
Wedding singer

High Fidelity
Two can play that game
Can't buy me love (Does that count?)

My sassy girl

keep them coming folks I just signed up for netflix lol

Sliding doors

and one that's not mentioned yet: Twice Upon a Yesterday

My five favorite romantic comedies are:

1. Grosse Pointe Blank
2. Bridget Jones's Diary
3. Secretary
4. Clueless
5. Romy and Michelle's High School Reunion

Some romantic comedies I like:
Princess Bride
Charade
Return to Me
Amelie
Bridget Jones Diary

cinema paradiso
say anything
better off dead
high fidelity
some kind of wonderful
bridget jones diary
amelie
serendipity
return to me

Sabrina
Annie Hall
The Apartment
My Best Friend's Wedding
Breakfast at Tiffany's
The Accidental Tourist

was watching 'shakesphere in love' and was bored after the first 10-15 minutes.....

My Sassy Girl
Virtual Sexuality
Amelie
Buffalo 66
Better Off Dead

Not really one of my favorite genres, but I think these movies are pretty decent:

Pretty Woman
Jerry Mcguire
The Wedding Singer
When Harry Met Sally
My Best Friend's Wedding

I also remember watching The Bachelor with some female friends of mine and they seem to love the movie. I thought it sucked!!!

Gotta go with The Wedding Singer

Just the fact that you asked for the "top 5 romantic comedies" makes High Fidelity a "must see" for you! (You'll get it when ya see it.)

My favs have all been mentoned, but they are:

When Harry Met Sally
Serendipity
Annie Hall
Bringin Up Baby
Say Anything