United Kingdom, July 8 -- Liam Gallagher is "laser-focused" on the Oasis comeback concerts.

The 52-year-old rock star has reunited with his brother Noel for the long-awaited Oasis reunion tour, and Liam has been a "total professional" in his approach to the shows.

A source told The Sun newspaper's Bizarre column: "Liam arrives 45 minutes before he goes on stage and leaves immediately afterwards.

"At Cardiff he had a car driven into the stadium to take him back to his hotel immediately. Liam is being a total professional and is laser-focused on giving Oasis fans the best show he can."

Liam is well-known for his outspoken personality, but the insider suggested he's matured since Oasis split back in 2009.

The source said: "It's incredib...