The former Bearsden resident, who appeared on both ITV's Popstars and Pop Idol, is the star of Tim Rice's new production of From Here to Eternity, which opens in London this week.
"It's a dream come true," said Campbell who, despite working predominantly in London and Los Angeles, insists he keeps "one foot in Glasgow".
He said: "I'm constantly trying to look for projects that could be written, filmed or recorded at home.
"If I could have my cake and eat it, I would live in Scotland but unfortunately our entertainment industry is not as progressive as that in London or LA."
He will, however, be back home on Sunday for the Prince and Princess of Wales Hospice's 30th Anniversary Variety Performance at the Clyde Auditorium, alongside fellow Scots stars like Susan Boyle and comic Karen Dunbar.
Proceeds from the evening will go towards the charity's Brick by Brick Appeal, to build a new home for Glasgow's Hospice, which is backed by The Herald's sister paper the Evening Times.
It's a cause Campbell feels passionate about. "We need to care for the elderly generation and be more compassionate towards them," he said.
Next year will see the release of his third album, a collection of original songs written both here and in the US.
"It's on to the next chapter," said the star who split from his wife, American actress Natasha Henstridge, in the summer.
The new album will include songs he hopes "articulate feelings people don't normally articulate, whether that be new love, lost love, unrequited love or the heartbreak of a breakup," adding: "It's often cathartic to put it into song."
Campbell will be hoping for a hit record and said he has never experienced negativity towards his success from other Scots, citing encouragement and the "well done son" mentality he's received.
As for Sunday's concert, he said: "I've been asked to give a set list but I have to admit, I haven't decided what songs I'll be performing. Although I can assure Glasgow it will be rousing."
l Tickets for the event can be bought from TicketSoup on 0844 395 4000 or at www.ticketsoup.co/30thanniversary