Kings of Leon's Caleb Followill to enter rehab?

Caleb Followill's Kings of Leon bandmates have reportedly urged the frontman to enter rehab. 
The 'Sex on Fire' stars cancelled their entire US tour earlier this week following a disastrous show in Dallas, Texas last Friday. 
Though an official statement claimed that Caleb's "exhaustion" was to blame for the hiatus, reports later surfaced that he suffers from severe anxiety and alcoholism. 
Now, according to Us Weekly, Kings of Leon are attempting to get Caleb to seek treatment for his issues so that they can return to the road by September. 
"They are trying to get Caleb to go to rehab. It is mostly for alcohol. [That's why] they ended up cancelling the whole tour... he drinks like a fish," a source told the publication. 
Another insider added: "It's true. Caleb's drinking is out of control and they are trying to get him into rehab. It's a dark demon he's been fighting for awhile." 
Meanwhile, Caleb told TMZ that he is resting his voice, adding: "I'm just trying to get better."