Article continues below advertisementLili Reinhart bared her toned stomach in a revealing new mirror selfie.The Riverdale star, 28, exposed her midriff in a tiny white tank top on Tuesday, July 22.Article continues below advertisementSource: @lilireinhart/InstagramLili Reinhart ditched her undergarments.Reinhart went braless in the risqué ensemble, pairing her cropped tank with purple and green shorts. The Personal Day founder posed bare-faced in the mirror, without a trace of makeup on her complexion.