X Factor stars Union J have been heaping the praise on Louis Walsh.
The boys have made it into the quarter finals, and reckon Louis is the best mentor for them, despite being in the bottom two twice now.
The group, who are the last remaining in Louis' category, said: "Louis is the best mentor we could have asked for - he knows his boybands."
Union J - made up of Jaymi Hensley, Josh Cuthbert, George Shelley and Jamie “JJ” Hamblett - explained: "If we're not happy about something, he'll listen to us.
"But most usually there is a mutual decision on things anyway. He's become like the fifth member of Union J".
This weekend will see the remaining acts sing two songs each, and the boys are preparing to "mix it up" with their performances.
They teased: "This week were' going to mix it up and do something really different and uptempo."
The X Factor 2012 continues this Saturday on ITV1 and ITV1HD, with the final five acts sing two tracks each with Abba and Motown themes.
Sunday's results show will see one more act get the axe, and there will be performances from Rhianna, Tulisa and Bruno Mars.