Celegorm was a Ballerino....
Or a Liltaro, if we want to make it Quenya.
This idea takes root in this hilarious encounter my friend had with a little Ballerino boy with blonde hair, ponytail, and the brattiest attitude you could imagine.
From then on, the idea that this athletic son of Fëanor might have dabbled in some sort of fine arts like the rest of his family, but in his own way. I imagine he had never even considered this possibility until a sad looking Maglor brought up how their musical performance was short one small role of a silent dancer because the actor had broken his arm, and they couldn't find a suitable replacement for him.
Celegorm could see his brother's eyes on himself, and as much as he tried to ignore it, he couldn't look past Maglor's sad eyes everyday, and tolerate his sorrowful ballads at night which was his passive aggressive way of saying, you suck at being a brother.
So he agreed, and even though he was very guarded towards this prospect at first, the teenage girl who later on became his first sister in law and kept Maglor's mean jokes in line grew on him, and with her, her craft and art.
And he could see how this newfound set of skills were affecting his other skills. His steps were quieter. He was more patient. He was a better hunter, and the best version of himself, and it was all thanks to the instructions of Lily, his dear friend, and the tune of his brother's harp guiding his steps as he jumped and twirled around.
He used to do this before as well, but back then, Celegorm had no purpose. No motivation for something greater as all the Noldor must feel in their hearts. He wasn't the son of his father, for his hands produced nothing significant but bringing creatures to their end swiftly and mercifully.
But when he was dancing, Celegorm felt like the son of Fëanáro and a Noldor. His hands might not have made something permanent to be set upon a lady's hand or a lord's brow, he might not have brought notes to life and entrancing people with simply touching strings of an instrument, but whoever watched him perform had his steps memorized and branded on their mind for life.