Jamie Lynn Spears is hanging around unbuttoned without pants for her Hump Day "meetings." The 29-year-old actress, singer, and sister to pop princess Britney Spears killed 'em on Instagram today, posting for her 2.1 million followers in a cozy-come-sexy look that was leggy and comfy at once. Jamie Lynn, whose 2020 ended on a high with the success of Netflix series "Sweet Magnolias," is ensuring that 2021 keeps her popular. With that bikini body and today's photos, it seems guaranteed. Check it out below.