Tā shì jīnnián zuì shòu zhǔmù de chāoxīnxīng xuǎnshǒu.
He is the most attention-grabbing breakout star athlete this year.
Tips
memory
超 (super/exceed) + 新星 (new star/nova). A supernova is a star that exceeds all other new stars in brightness. The figurative meaning follows naturally — a person who suddenly outshines everyone.