Helen Reddy: Often referred to as the "Queen of 70s Pop," the Grammy Award-winning Australian singer and primetime variety show star comes to Clearwater for two shows. The first is tonight at 7:30 p.m. (the second is Saturday) at Capitol Theatre, 405 Cleveland St., Clearwater. $52–$85. (727) 791-7400.
Much Ado About Nothing: Jobsite Theater presents the original battle of the sexes in this Shakespeare comedy. The performance begins at 8 p.m. in the Shimberg Playhouse at the Straz Center in Tampa. $28. (813) 229-7827.
Dalí Loves Pi: Dalí loved the irrational numbers pi and phi, often using them and other mathematical principles in his art. In observance of National Pi Day, the Dalí Museum features pi and math-inspired exhibits, films and treats in the cafe. It starts at 10 a.m. at the Dalí Museum in St. Petersburg. $21, $19 seniors, $15 students and children ages 13–17, $7 children ages 6–12. Admission is $10 after 5 p.m. today. (727) 823-3767.
Lynne Koplitz: She moved from Alabama to New York with theater on her mind and discovered her talent for stand-up comedy in the process. Now she headlines at major comedy clubs across the country. See her at 8:30 p.m. at Side Splitters Comedy Club, 12938 N Dale Mabry Highway, Tampa. $10–$25. (813) 960-1197.
Community, 8 p.m., NBC: Abed records Chang's amnesia for a documentary. We used to know what it was called, but we forgot.
Grey's Anatomy, 9 p.m., ABC: The recent management shakeup at Seattle Grace Mercy West has everyone on edge, but we're betting Avery is the one they're hinting wants to leave the hospital altogether. Why, just because he runs it now?