Tā chuānzhe nà jiàn guāngcǎi duómù de lǐfú zǒu jìnle huìchǎng.
She walked into the venue wearing that dazzling gown.
Tips
memory
光彩 (radiance / splendor) + 夺目 (to seize the eyes / eye-catching) — so brilliant it steals your gaze. 夺 literally means 'to seize,' making this idiom quite vivid.