• American Idol winner and Skechers spokesmodel David Cook visits JCPenney to tout the brand’s fall footwear collection. Manhattan Mall, 901 Sixth Ave., at 33rd St. (212-295-6120); noon3.
• Denim, separates, and accessories are 40 percent off at True Boutique, in-store and online. Through 8/15. 278 Mott St., nr. Houston St. (212-431-7709); TS (noon7), Su (noon6).
• All special-order signature-collection lighting and home accessories are 25 percent off and Thomas O’Brien for Hickory Chair furniture is 50 percent off at the Aero summer-retreat sale. Through 9/5. 419 Broome St., nr. Crosby St. (212-966-1500); MS (116).
• Take 80 percent off menswear, womenswear, shoes, bags, and accessories from spring/summer 2009 and past seasons at the Alexander McQueen sample sale. Metropolitan Pavilion, 125 W. 18th St., nr. Sixth Ave.; T (97), W (96).