My Investment Piece: Givenchy by Riccardo Tisci Rottweiler T-shirt for men, $265 (barneys.com for stores).
Why I've Gotta Have It: The shirt is so versatile and yet so unique any way you wear it, it makes a statement.
Big Night Look: With heels and a leather-trimmed tuxedo jacket, the jeans-and-T-shirt look is ready for a concert or cocktails.
Tips: Tuck the front of the shirt in and leave the back out to minimize bulk.
Wear only simple charm necklaces that won't distract from the shirt's print.