Demi Lovato is a Gemini.
Demetria Devonne Lovato ( [ ˈdɛmi_loʊ-ˈvɑːtoʊ ] or ; born August 20 , 1992 ) is an American singer , songwriter , and actress . Gemini (astrology) . Under the tropical zodiac , the sun transits this sign between May 21 and June 21 .