I knew this was influenced of Whitney, Claude said it on twitter months ago. She is the Vocal Bible and Jesse J has said many times she is one of her main influences. You can hear the subtleties of Whitney's 'I wanna dance with somebody' same as for Lady Gaga, 'Marry the Night'.
Well i think they were definitly going for Whitney here, but it sounds very much like a song Katy would release, with that said its 100% Jessie J's song and she owns every second of it better than anyone else could sing it!