Olivia and Rosy: Your Belmont High Idols [Video]

Sitting on the edge of the stage in the auditorium, Olivia Kerins and Rosy Fitzgerald began singing Jessie J's "Price Tag" but not like the British pop star's original, this one was a more intimate, harmonized version that quieted the audience at this year's Belmont Idol competition. 

And Sophomore Kerins and freshman Fitzgerald pop acoustic mashup impressed the judges and delighted a very loud group of supporters winning Belmont Idol 2012.

"We really wanted to play together and than Idol came," said Kerins after the show as she and Rosy stood on stage with friends and family, flowers and prizes in their hands.

Fitzpatrick, who played the guitar for the duo, said she only started playing four years ago, "but I have been singing ever since I can remember."

This year's show saw the first rapper (Aram Galstain), the largest ensemble - the seven-member jazz group CAJAMA FLOGACHNO - three dancers and the multi-talented Matt Nemitz who performed in a quarter of the 12 groups, playing three different instruments - ukulele, guitar and piano - with each group.

Judges Assistant Principal David Smokler – who revealed he's a Snoop Dogg fan – teacher Catherine Larkin and musician Fred Dominici had a tough time to determine a winner.

But in the end, the soulful rendition from Olivia and Rosy carried the day and won the hearts of the judges.