Port Augusta's Erika Owens has been on a Gaga quest ...following her around the country, in hope to get backstage.

She's flown to three cities, to see five shows with five different Gage-inspired outfits.

She got on stage in Sydney last week. But that wasn't good enough.

This week, in Melbourne, it happened!  Gaga spotted Erika in the Monster Pit and invited her backstage! She even got a kiss!

Totz jealous.

Nice work, Erika.