The Vamps feel "weird" performing without James McVey.
The 24-year-old singer is currently competing on "I'm A Celebrity... Get Me Out Of Here!" but his bandmates have continued their commitments without him and don't like it very much.
Connor Ball said: "It is weird. We just had a gig in Argentina and with just me and Brad [Simpson] in front of Tristan [Evans] drumming.
"It was really weird. It didn't feel right.
"Some of the fans were a little bit annoyed because we weren't allowed to say in advance why he wasn't going to be at the gig."
The "All Night" singer is vegetarian and even if he gets really hungry in camp, Connor is convinced his friend will stick to his beliefs.
He told the new issue of OK! magazine: "I think he will stick to his beliefs and morals about it.
"He said from the start he's not going to and I believe him. He said he doesn't even like the thought of meat."
While Connor is very supportive of his bandmate, he admitted he's keen to see him suffer.
He said: "I've been voting for him [to do the trials] every night."
James has suggested he might use his pay cheque from the show to buy an engagement ring for girlfriend Kirstie Brittain and Connor thinks it would be a great idea.
He said: "He has definitely spoken about it.
"I don't know if that's what he'll do with the money from it but it's a lovely idea.
"They're great together so it would be really nice.
"They are constantly speaking every day when we're working so I think he will struggle, but they know how strong they are so it will be fine."
And Connor also thinks his pal should pop the question to the model on the famous bridge as he leaves the camp.
He said: "That would be sick! I hope he does."