Grace Jones is one of only a few constants in life. She goes beyond the old saying that even a stopped clock tells the right time twice a day by being so far ahead of her time, when she settled on her style that even twenty eight years later, 'Nightclubbing' - her opening song at Camden's Roundhouse - still sounds like the future of pop.

Tellingly, the track was written by Bowie and Iggy during their Berlin-era; encapsulating the decadent, dangerous, louche-cool that's been Grace's stock in trade throughout disco, 'James Bond', ZTT and on to her surprisingly quite good new album 'Hurricane'.

It's that album she's on tour to promote and while the set alternates between new songs and hits, it never drags. Of course, a woman who changes her costume between EVERY SONG is always going to keep your attention, if only to see what she'll have on her head next (we get everything from an inflatable duvet, the Guggenheim, a praying mantis's idea of Satan and something Princess Leia might wear in the rain). Grace manages to keep up a running banter as she's changing in the wings, apologising for hitting her dresser: "I can't help it. I may be an alien but I still get angry!" And delighting in the innuendo of asking for a drink by yelling, "I need to suck on something!"

Her stage set is cheap by today's production values - riding up and down on the kind of hydraulic lift the council use to put up Christmas lights and occasionally standing in front of a fan. But Grace makes such things seem glamorous by association. She is, after all, the product of the 70s New York club scene, where the dingiest sweatboxes were transformed into pleasure palaces at the flick of a light switch.

Everyone, at some point in their life, should wear a mirrored top hat and stand under a laser - especially if, like Ms Jones, they're singing 'Love is the Drug' to the man who wrote it. We can't see Mr Ferry's expression from where we're standing but we can see Frank Skinner and he seems to be having a fun time.

This year's futurepop sensation Lady Gaga is also in attendance, possibly wondering if she too has the stamina to carry on dressing like a lunatic for 30+ years and knowing she'll never have a record with such an exciting opening chord sequence as 'Slave to the Rhythm'. She'd certainly never think it was the most natural thing in the world to hula hoop throughout its performance - never missing a note or a revolution.

"I used to be queen of this thing!" yells Grace, "Imagine being queen of a hoop!"

We can think of worse things.

Fans are pulled on stage to dance, during 'Pull Up To the Bumper'. At first we worry for Grace's safety as she's groped and frotted by topless gay men. Then we worry for their safety because, quite frankly, you wouldn't want to be on the wrong side of her slapping hands.

But for all her fearsome reputation, Grace Jones looks to be having the time of her life on that stage. Which is as it should be for someone who's dedicated their entire life to performance. Bravo to a unique, strange and wonderful woman.