D-Side, whose new song Invisible is out on 7 July, said they loved being on the tour.
"It's great because it's just us and Darius and the rest are all females."
Next up were girl band Tommi, who described their music as: "Hip hop R&B with a bit of pop - it's very cheeky.
"If we're having little digs at each other, we put that into our music with our slang. We're the new breed of tomboys," they added.
Their debut song, Like What, is out on 23 June.
Casual but cool
Then we found out that Girls Aloud were in the building! They were grabbing a bite to eat - and then they'd be with us.
They arrived looking casual but cool. Cheryl's replaced her bob haircut with a braided style and Sarah had gone for plaits too.
Wonder if it's anything to do with Beckham?
The girls said they were "really happy and excited" for Javine Hylton, who's releasing a solo single after missing out on being in the band by a whisker.
They said they'd met Prince Harry too: "He's so down-to-earth and normal," said Cheryl.
But they refused to reveal what their next single will be. "Do you think we should slow it down a bit?" they asked us. "Why not!" we replied.
Mis-Teeq told us about the sassy theme of their new single, Can't Get It Back.
"It's about a relationship gone wrong," explained Su-Elise.
"We are saying we gave you our love and our time, which is priceless. As for the rings and stuff that you gave me - you're asking for that back? I think not!"
Alesha said the girls love doing the arenas: "That's when the crowd are just up for it!"