If you re shopping for art, check out tonight s 24th Annual Original Art Auction at Playhouse on the Square, which includes a dinner buffet and a live and silent auction of works by more than 100 artists. Today begins the big, two-day Earth Day Celebration at the Shell, a weekend of food, music, environmental information, and other shenanigans. Classical guitarist Lily Afshar is at the Bartlett Performing Arts and Conference Center tonight. One of the most popular parties of the year in Memphis, the Architects Midtown Rhythm & Blues Party at Askew Nixon Ferguson Architects, features Tumblin Sneakers, Billy Gibson, Gerald Stephens, and Ashley Wieronski; proceeds benefit Senior Services. Porch Ghouls with Syrup and The Go Fast are at Young Avenue Deli. And there s a Monster Rock Fest at Newby s.