Whoo! A huge congrats to Red Velvet, who just won their first #1 for their new song "Dumb Dumb" on 'The Show' for the September 15 episode!

Although there was some serious competition, Red Velvet clinched the win in the end, and we're sure this is only the first of many wins to come! The girls looked so happy and excited when it was announced. And for their speech, Wendy�thanked everyone, including their company, managers, fans and family!

SEE ALSO: Seoul Philharmonic Orchestra reveals dramatic MV for Red Velvet's 'Psycho'

Check out their performance of "Dumb Dumb" below!