Some devoted fans had turned out as early as 9am to get to the front of the queue and be first to enter the arena.
Many had turned out in Rod's trademark tartan, and others had donned the colours of his beloved Celtic for the show.
Rod fan Ronnie Peters, 56, said: "This is the 20th time I'll have seen him, he's just a top man.
"Maggie May is my favourite song. It's the best song ever written in my opinion. I hope he plays that."
Die-hard Rod devotee Rose Haggerty, from Glasgow, was just back from having seen the star perform the same show in Las Vegas.
But there was no way she was going to miss out on her idol's gig in her home town.
Rose, 53, said: "I've seen every show he's performed here since 1977.
"I've seen him loads of times. I keep coming back.
"He's just amazing. I've seen him so many times but I've never had the chance to meet him. It would be worth it just to shake his hand. He's a proper star."
Lousie Hendry, 15, added: "I'm so excited. He's absolutely fantastic. I can't wait."
Oliver Webb, 8, from, Bishopbriggs, was waiting in the queue with his mum Delores to see Rod.
He said: "I think the Hydro looks really cool. It looks like a spaceship."
Mum Delores added: "I've seen Rod Stewart six times. I think he's fabulous, an amazing performer.
"And he just keeps getting better and better."
And it wasn't just Rod who was putting on a spectacular show.
The 12,000-capacity SSE Hydro looked like a beacon of light on the banks of the Clyde.
It was more than eight years in the making and construction was affected by fire, but it is now finally ready to rock.
Designed by Foster & Partners architects, the building has been described by many as Scotland's biggest feat of engineering this year.
It is hoped it could help generate up to £131million for the local economy.
The Hydro boasts 145 digital screens, a 137m display showing uninterrupted information and a wi-fi system which can be used by 12,000 people at the same time.
The fire which hit the building as it was being built prompted fears the £125m venue would have to delay its opening.
The project suffered a setback when a blaze broke out in the roof-space in June.
It later emerged the fire had been started by a spark from welding work, while most of the damage was caused by water used to douse the flames rather than the actual fire.
The SECC, which owns the Hydro, said the complex remained on schedule to open in September but they faced "additional challenges" to get it ready in time for Rod to make his glamorous entrance.
Built on a 64-acre site near the Clyde Auditorium, the venue will free up the nearby SECC to concentrate on exhibitions and conferences.
The Hydro is 147ft high and is modelled on Greek and Roman amphitheatres.
A special translucent skin can glow 12.8million different colour mixes or have images projected directly on to the surface.
The MOBO awards later this month will showcase the venue to the world as it is shown in 200 countries.
Fleetwood Mac, Depeche Mode, the Proclaimers, Bruno Mars and Calvin Harris are also lined up to perform in the next couple of months.