Plans for tonight: Rap in the park, bluegrass in the garden
• The rapper Nas headlines this week's Twilight Concert Series show, at Pioneer Park, 300 West and 300 South, Salt Lake City. Opening act: Tinie Tempah. Show starts at 7; gates and Twilight market open at 5. Tickets are $5, at the gate.
• Steve Martin (yes, that Steve Martin) and The Steep Canyon Rangers perform bluegrass at Red Butte Garden, 300 Wakara Way, University of Utah campus, Salt Lake City. Show starts at 7:30. Sold out.