I know font for "essie", but what font is used for J?

Deftone Stylus  Suggeriti da juan_e_b_ 

not a font. it was specifically designed for the album

Jessie.J

You can use the 'J' from the suggested font & then add the flick in on another program. I was recreating the logo for Media, i used the font & separate texts boxes, then messed around with character spacings.. its actually looks passable!