Duffy appeared on the Channel 4 show in the summer, taking on the role of Declan Brady - nephew of Waugh's character Cheryl and son of bad boy Brendan (Emmett Scanlan).
Waugh told PA at the Inside Soap Awards: "[Jay] tweeted us both and said 'I really miss my auntie and my dad'.
"I really hope he comes back to visit us soon. He was really popular, so hopefully he'll come back. Lovely kid, really nice guy, and a little heartbreaker. Our very own Justin Bieber - got all the teenage girls hearts a flutter."
Discussing the future of her screen family, Waugh continued: "It's a tough time for the Brady bunch but we're working hard and we're going to get back on top. It's going to hot up. So I think next year we've got something really exciting for the family."
Hollyoaks viewers saw Declan leave the village earlier this month following his break staying with his father. Brendan has since been sent to prison after being wrongly accused of evil Silas Blissett's murders.
> Inside Soap Awards 2011: The full winners list
> Inside Soap Awards 2011: The winners in pictures
> Inside Soap Awards 2011: Arrivals in pictures
> Read more Hollyoaks spoilers and news
Watch Inside Soap Awards guests telling Digital Spy about their fantasy celebrity soap guests below: