Asterix the Gladiator written by Rene Goscinny and illustrated by Albert Uderzo
The village bard Cacofonix is captured by the Roman Prefect for Gaul. The prefect needs a unique present to offer in Rome to Caesar. Cacofonix's singing is indeed unique (happily so--he is quite terrible) and the villagers aren't so worried when he's disappeared. As soon as they discover he's been kidnapped by the Romans, they start a rescue mission. The mission will take Asterix and Obelix all the way to the Circus Maximus in Rome to save their fellow villager.
The story is the standard mix of puns and jokes along with the mild, ridiculous violence that comes from an ancient tribe with a potion of undefeatable strength. This provides the standard good fun of an Asterix comic.