Shawn Mendes and Victoria Justic at Universal's Halloween Horror Nights in Hollywood

Shawn Mendes shows off his toned arms while buying a eucalyptus plant at a local farmer's market

Shawn Mendes Scopes Flowers at Farmers Market in White Tank Top

Camila Cabello looks gives a peek at toned tum in New York... while ex Shawn Mendes hits gym in LA