Everybody knows a turkey and some mistletoe...
Ferb looked up, discreetly. He knew the song, yes, but more important was the singer. He knew her, too, although on a more personal level.
Help to make the season briiiight - yeah...
There was no dout - that was Vanessa. Whomever invited her to the brothers' holiday open mic, he would give them a thumbs-up later.
An idea brewing, he grabbed his electric and appeared onstage.
She finally glimpsed him when the first chorus ended. But he was already expertly shredding a solo.
And the couple of kids finished to a roaring crowd.
For those of you not enlightened, P&F's holiday album has a bunch of well-known Christmasy songs on it, all covered by the characters. Vanessa got "Chesnuts Roasting on an Open Fire" (which I don't have rights to, btw), and it is easily my favorite out of all of them. I definitely recomend giving it a listen. Olivia Olson can sing.
Anyway, here's supposed to be the in-universe explanation of how Ferb's rad guitar skillz ended up in the middle there.