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The 45-year-old Smashing Pumpkins frontman, who has previously been romantically linked to Jessica Simpson and Courtney Love, sparked rumours of a relationship when he mentioned Veronicas singer Origliasso on his Twitter page.
Corgan wrote: "Looking forward to seeing @jessicaveronica tomorrow and all the wonderful presents she got for me in Sweden and Atlantic City! Can't wait!"
He later tweeted: "Love is: getting presents from someone who loves you. If the world only knew how giving @jessicaveronica really is. Full of surprises!"
24-year-old Origliasso then replied: "@Billy I'll have one hell of a surprise for you in the next nine months... You'll be crying @Billy, when I get my hands on you tomorrow."
The pair were first spotted together at Sydney nightclub Trademark in April this year.
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