What a fragrant and lovely Graham Norton couch this week as pop songstrels Katy Perry and Cheryl Cole take their dainty places. Ubiquitous comedian Ross Noble is also a guest, the thorn between two roses.

Cheryl Cole, after a difficult couple of years, including her marital problems and all of that unpleasantness over her here today/gone tomorrow role as a judge on the US X Factor, is back in the limelight again. She'll be singing her new single, Call My Name.

The hard-working Katy Perry has also had her fair share of personal troubles, what with the collapse of her brief marriage to Russell Brand. But she seems to be on the up, and will be promoting her concert-tour documentary Katy Perry: Part of Me 3D.

The host's two female guests tonight have a lot in common - from their dazzling white teeth, to their tabloid omnipresence, to their dubious tastes in men. And they're both pop singers. Cheryl Cole and Katy Perry certainly offer plenty of juicy material for The Telegraph agony uncle. Cole will be plugging her new single, while possibly deflecting questions about her short-lived stint as a judge on the US X Factor, while Perry has a new tour coming up. Joining them on the sofa is comedian Ross Noble.

Steve Coogan's last big attention-grabbing television appearance saw him sober-suited and angry giving evidence about press intrusion and phone-hacking to the Leveson Inquiry last year.

Tonight he joins Charlize Theron and Jon Hamm on Graham Norton's big red sofa, presumably to discuss his travails at the hands of an unforgiving press and the return of his monstrous, brilliant creation, embittered Radio Norwich DJ Alan Partridge. There will be a Partridge film later this year and a TV series is set for Sky Atlantic.

Kristen Stewart, star of Twilight, never looks particularly happy, so here's hoping she cheers up a bit when she arrives on Norton's sofa. Stewart, well-known as the inamorata of her co-star Robert Pattinson, is in the studio to promote her new film Snow White and the Huntsman.

They will be serenaded by Engelbert Humperdinck, singing UK Eurovision entry Love Will Set You Free. In the comedy corner is the mighty Chris Rock, talking about his new movie, the animated kids' comedy Madagascar 3: Europe's Most Wanted.

This week's guests on the garrulous host's banquette of banter include Twilight starlet Kristen Stewart, who'll be talking about upcoming fairy-tale flick Snow White and the Huntsman, US funnyman Chris Rock and crooner Engelbert Humperdinck - who will also perform Love Will Set You Free, the UK's surprisingly decent entry for the Eurovision Song Contest in a fortnight's time. Well, he can't do much worse than our recent efforts.

Graham Norton nearly matches Piers Morgan in ratings

The Graham Norton Show rallied to a series high on Friday night (May 4) of nearly 4 million viewers.

Graham Norton's earnings top £2.5m

Graham Norton earned more than £2.5m in year to end July 2011 from his company So Television, which includes his £2m-a-year BBC presenting deal.

Graham Norton's plans surprise if Beyonce returns

Graham Norton has a jig surprise planned for Beyonce if she appears on his chat show again.

I plug rotten films, admits Graham Norton

Chat show host Graham Norton has admitted promoting "terrible" films simply to get stars to appear on his BBC1 show.

The latest series of the Telegraph agony uncles's playful chat vehicle rattles on with customary vim. This week's guests include former Friends star Matt LeBlanc, and Hollywood hunk Zac Efron, who will be talking about his latest film, [i]The Lucky One]. Though his eyebrow-cocked patter may not be as daring as it once was, Norton is ever the candid conversationalist. His disarming charm makes for entertaining interviews.