What is it about Christina Aguilera and uplifting songs?

I'm not very good at matching singers with their songs, so it was only yesterday that I worked out that both The Voice Within and Beautiful are written by Christina Aguilera. Listening to the songs, it sort of feels like she's singing to me.

Beautiful

Every day is so wonderful
And suddenly, it's hard to breathe
Now and then, I get insecure
From all the pain, I'm so ashamed

I am beautiful no matter what they say
Words can't bring me down
I am beautiful in every single way
Yes, words can't bring me down
So don't you bring me down today

To all your friends, you're delirious
So consumed in all your doom
Trying hard to fill the emptiness
The piece is gone left the puzzle undone
That's the way it is

You are beautiful no matter what they say
Words can't bring you down
You are beautiful in every single way
Yes, words can't bring you down
Don't you bring me down today...

No matter what we do
(no matter what we do)
No matter what they say
(no matter what they say)
When the sun is shining through
Then the clouds won't stay

And everywhere we go
(everywhere we go)
The sun won't always shine
(sun won't always shine)
But tomorrow will find a way
All the other times

'cause we are beautiful no matter what they say
Yes, words won't bring us down, oh no
We are beautiful in every single way
Yes, words can't bring us down
Don't you bring me down today

Don't you bring me down today
Don't you bring me down today

The Voice Within

Young girl don’t cry
I’ll be right here when your world starts to fall
Young girl it’s alright
Your tears will dry, you’ll soon be free to fly

When you’re safe inside your room you tend to dream
Of a place where nothing’s harder than it seems
No one ever wants or bothers to explain
Of the heartache life can bring and what it means

Chorus:When there’s no one else, look inside yourself
Like your oldest friend just trust the voice within
Then you’ll find the strength that will guide your way
You’ll learn to begin to trust the voice within

Young girl don’t hide
You’ll never change if you just run away
Young girl just hold tight
Soon you’re gonna see your brighter day

Now in a world where innocence is quickly claimed
It’s so hard to stand your ground when you’re so afraid
No one reaches out a hand for you to hold
When you look outside look inside to your soul

Chorus
Life is a journey
It can take you anywhere you choose to go
As long as you’re learning
You’ll find all you’ll ever need to know
(be strong)
You’ll break it
(hold on)
You’ll make it
Just don’t forsake it because
No one can tell you what you can’t do
No one can stop you, you know that I’m talking to you

ChorusYoung girl don’t cry I’ll be right here when your world starts to fall