Hear'Say's Myleene and Noel are seen blubbing on a TV show which will be on over Christmas.
Myleene Klass bursts into tears because she can't trust people any more after becoming famous, according to the Sun newspaper.
And Noel Sullivan gets all sniffly when he has to say goodbye to his mum after getting to see her in the middle of his hectic schedule.
'They hate us'
Those aren't the only surprises in the documentary - Danny Foster admits some other bands hate Hear'Say.
He said: "We never expected the record industry to be like it is. People would be amazed if they knew what it's like."
"The nicest people are usually the most successful, like Robbie Williams, but smaller bands are not. We have had a lot of problems - they hate us."
The ITV show will be aired on 30 December.