SAD SAD DAY for ALL! Dick Clark, the creator of "American Bandstand" and "Dick Clark's New Year's Rockin' Eve," died this morning of a heart attack. We will all miss ringing in the New Year with "THE WORLD'S OLDEST TEENAGER." RYAN SEACREST, has some big shoes to fill!!!

Check out what celebrities have to say on TWITTER:

MARIO LOPEZ

@MarioLopezExtra: ...in describing Mr. Clark.. He was a real inspiration & influence in my life. I will dearly miss my friend... Rest well DC

DON LEMON

@donlemoncnn: There is a HUGE dance party in heaven right now lead by #DickClark & #DonCornelius. #RIPDickClark

JOAN RIVERS

@Joan_Rivers: Very sad to hear about Dick Clark. What a great life. What a great career. Relevant until the end. He will be missed!

SNOOP DOGG

@SnoopDogg: REST IN PEACE to the DICK CLARK!! U were pioneer n a good man!! Thank u sir

RUSSELL SIMMONS

@UncleRUSH: Dick Clark was eternally young. No matter what culturally phenomenon was happening, he always embraced it. RIP...