>> Jay: FOLKS, CHECK OUT THE

ALL-NEW 2007 TOYOTA YARIS

LIFTBACK, RIGHT OVER THERE.

MY NEXT GUEST HAS SOLD OVER

30 MILLION RECORDS WORLDWIDE.

AND "ROLLING STONE" MAGAZINE

CALLED HER "THE WORLD'S NUMBER

ONE POP PUNK PRINCESS."

I LOVE THAT.

[ CHEERS ]

TONIGHT, SHE'S PERFORMING HER

NEW SINGLE, "WHEN YOU'RE

GONE" --

FROM HER CD "THE BEST DAMN

THING," WHICH IS GETTING GREAT

REVIEWS.

PLEASE WELCOME AVRIL LAVIGNE,

LADIES AND GENTLEMEN.

[ SCREAMS AND APPLAUSE ]

♪♪

♪ I ALWAYS NEEDED TIME

ON MY OWN

I NEVER THOUGHT I'D NEED YOU

THERE WHEN I CRIED ♪

♪ AND THE DAYS FEEL LIKE

YEARS WHEN I'M ALONE

AND THE BED WHERE YOU LIE

IS MADE UP ON YOUR SIDE ♪

♪ WHEN YOU WALK AWAY

I COUNT THE STEPS THAT

YOU TAKE ♪

♪ DO YOU SEE HOW MUCH I

NEED YOU RIGHT NOW? ♪

♪ WHEN YOU'RE GONE

THE PIECES OF MY HEART

ARE MISSING YOU ♪

♪ WHEN YOU'RE GONE

THE FACE I CAME TO KNOW

IS MISSING, TOO ♪

♪ WHEN YOU'RE GONE

THE WORDS I NEED TO

HEAR TO ALWAYS GET ME ♪

♪ THROUGH THE DAY

AND MAKE IT OKAY

I MISS YOU ♪

♪♪

♪ I NEVER FELT

THIS WAY BEFORE

EVERYTHING THAT I DO

REMINDS ME OF YOU ♪

♪ AND THE CLOTHES YOU LEFT

THEY LIE ON THE FLOOR

AND THEY SMELL ♪

♪ JUST LIKE YOU

I LOVE THE THINGS

THAT YOU DO ♪

♪ WHEN YOU WALK AWAY

I COUNT THE STEPS THAT

YOU TAKE ♪

♪ DO YOU SEE HOW MUCH I

NEED YOU RIGHT NOW? ♪

♪ WHEN YOU'RE GONE

THE PIECES OF MY HEART

ARE MISSING YOU ♪

♪ WHEN YOU'RE GONE

THE FACE I CAME TO KNOW

IS MISSING, TOO ♪

♪ WHEN YOU'RE GONE

THE WORDS I NEED TO HEAR TO

ALWAYS GET ME THROUGH THE DAY

AND MAKE IT OKAY

I MISS YOU ♪

♪ WE WERE MADE FOR

EACH OTHER OUT HERE FOREVER

I KNOW WE WERE

YEAH YEAH ♪

♪ ALL I EVER WANTED

WAS FOR YOU TO KNOW

EVERYTHING I DO

I GIVE MY HEART AND SOUL ♪

♪ I CAN HARDLY BREATHE

I NEED TO FEEL YOU HERE

WITH ME

YEAH ♪

♪ WHEN YOU'RE GONE

THE PIECES OF MY HEART

ARE MISSING YOU ♪

♪ WHEN YOU'RE GONE

THE FACE I CAME TO KNOW

IS MISSING, TOO ♪

♪ WHEN YOU'RE GONE

THE WORDS I NEED TO HEAR TO

ALWAYS GET ME ♪

♪ THROUGH THE DAY

AND MAKE IT OKAY

I MISS YOU ♪

♪♪

[ CHEERS AND APPLAUSE ]

>> THANK YOU.

>> Jay: AVRIL LAVIGNE.

NICE JOB.

THANKS A LOT.

I WANT TO THANK ALL MY GUESTS.

OF COURSE, BILL COSBY.

BILL, THANK YOU VERY MUCH.

[ CHEERS AND APPLAUSE ]

THANKS TO THE EXPLORERS FROM

OREGON.

WANT TO SEE ANOTHER SONG BY

AVRIL LAVIGNE, FOLKS?

LOG ON TO OUR WEBSITE AT

NBC.COM/TONIGHTSHOW.

MONDAY NIGHT, ROBIN WILLIAMS

WILL JOIN US.