You’re not wearing underwear this weekend. Shh, don’t tell anyone.

DO
PostSecret Fundraiser
What: A reading of and exhibit from the secret-revealing postcard books to benefit CHARLEE Homes for Children.
Why: Truth is stranger than fiction.
When: Fri. (reading) & Sat. (exhibit), 7 p.m.
Where: Reading, ArtCenter/South Florida, 800 Lincoln Rd.; exhibit, 4 Projects, 3814 NE Miami Ct. Info at 305-672-4709.

SHOP
Red Carter Sample Sale
What: Up to 60 percent off the Miami Beach designer’s cute suits for men and women.
Why: You’re not having a fat day.
When: Sat., 10 a.m.-2 p.m.
Where: 1819 West Ave., no. 6. R.S.V.P. to 305-532-3467.

CHEER
Polo World Cup
What: The noble Englishman’s game with a South Beach twist.
Why: It’ll be fun, you ninny.
When: Fri.-Sun., 2 p.m.
Where: The beach behind The Setai, 2001 Collins Ave. Info at 866-468-7630.

READ
Diary of a South Beach Party Girl
What: A new book about a girl who moves to SoBe, parties, and parties some more.
Why: Bronte’s overrated.
When: Your brain’s been working too much.
Where: Online at amazon.com or your local bookstore.

HEAR
Ratatat
What: Electro-rock duo from New York gets the dance party started with their hit “Wildcat.”
Why: Rrrroarrr!
When: Sat., 9 p.m.
Where: Post, 1777 SW 3rd Ave. (305-856-8585). Info at myspace.com/poplife.