Sober. Nothing beats it IMO.

I haven't heard all her music, but for me Because of You is the best. It is so raw and haunting. I heard her perform it live at the Capital Summertime Ball in 2009 and it was spine tingling.

she is great ..... and i love how she found her own style and niche ....

my fave songs:
beautiful disaster
judas
stronger
and majority of the songs on her album 'breakaway'

The Trouble With Love Is..

I've been a Kelly fan for a decade now, I love all of her albums so it would be hard to pick just one, but my favourite ever tracks by her are:

My Life Would Suck Without You (probably my ultimate favourite)
Since U Been Gone
Already Gone
Never Again
Maybe
Underneath The Tree
Honestly
Because Of You
Behind These Hazel Eyes

DEFINITELY!

My favourite non-single has to be Irvine from My December. It's not for everyone because it's about having faith during a low point in life, but it's not done in a heavy-handed way. It's also more poignant given the problems she was having with Clive Davis at the time.

Every song tbh

What Doesn't Kill You (Stronger)

It's the only song by Kelly Clarkson I've downloaded on iTunes. Brilliant pop song imo.

Behind These Hazel Eyes

other notable songs;
Cry
You Can't Win
Stronger
Breakaway
Already Gone
Dark Side
Never Again
Since U Been Gone

Toss up between:

Addicted
Behind These Hazel Eyes
Never Again
What Doesn't Kill You (Stronger)

Addicted, BTHE and NA are brilliant dark-pop-rock songs while WDKY(S) is a brillaint mainstream pop anthem.

Because Of You. You can tell form how she sings it that the song means a lot to her and is very personal.

Because Of You

You Found Me
Long Shot
Behind These Hazel Eyes
Before Your Love
Breakaway
Stronger (What Doesn't Kill You)
Can I Have A Kiss
Tie It Up
Wrapped In Red
Since U Been Gone
Catch My Breathe
Because of You

I've always liked this one.

Along with:

Gone
Breakaway
Behind These Hazel Eyes
Addicted
Mr Know It All (particularly the country version)
Since U Been Gone
Miss Independant
I Do Not Hook Up

I didn't realise how many of her songs that I liked

Another vote for Sober here,

followed by Don't Ever Give Up On Me, I Forgive You and Already Gone although all her material is pretty strong and deserves a mention.

As a massive of fan of Kelly since she won American idol, it will be hard to pick:

The Trouble With Love
Since U Been Gone
My Life Will Suck Without You
Stronger
Breakaway
People Like US
Behind These Hazel Eyes
Catch My Breath
I Do Not Hook Up
Miss Independent

Never Again. lyrically brilliant!

Depends what mood I'm in

Breakaway album songs are great for feeling good after a break up, My December are great for feeling sombre but not entirely depressed. All I Ever Wanted depresses me but still some amazing tunes on there.

All time fav has to be Honestly.

Behind these Hazel Eyes.

Addicted is also good.

My Life Would Suck Without You.

I don't know that many of her songs but the ones I've heard I've liked:

Breakaway
My Life Would Suck Without You
Miss Independent
Stronger (What Doesn't Kill You)
Mr Know It All
Because Of You

Where Is Your Heart? And Beautiful Disaster

Sober, Since You Been Gone and Breakaway (well I had to include Breakaway seeing as I'm in the video)!

I've been a huge Kelly fan since idol and its just too hard to choose. She's the greatest voice of my generation I think (I'm 22).