Josephine Skriver shows off toned midriff in pink crop top as she steps out for Genny fashion show

Addison Rae highlights toned tummy in a crop top and baggy green sweats after Pilates in Los Angeles

Katy Perry draws a crowd at Good Morning America as she exposes her belly in a yellow crop top

Vanessa Hudgens displays her toned midriff in white crop top and red shorts