And last week, the star returned to the small screen as the sole presenter of RTE Two's The Cafe.
"It's my fifth season doing the show and as always I'm loving it," he said. "The first three years, I did it with Laura Woods who is a great friend of mine and, last year, I did it with Liam, so it was a bit strange coming back on my own, but I'm really enjoying it.
"I'm delighted to have one done and under the belt now because I suppose I was apprehensive and nervous about doing it without someone by my side.
Aidan does admit, however, that there's a lot more responsibility on his shoulders now.
"It is a big change for me. There was never really any risk before," he told the Diary. "I had someone else to share the pressure with, and when they were doing their bit I was able to get my act together, but I suppose it's just a matter of getting used to it.
"It's a very busy, fast-paced show, especially because it's live and you've so much more to remember when you're on your own," he added.
Despite his growing celebrity status, modest Aidan maintains he'd prefer not to reach the top too quickly.
"I'm already working on two great shows, so I think that's enough to keep me busy for now.
"Friends have been saying to me 'you're everywhere these days' and it has me thinking it's not always a good thing to be too publicised.
"I mean, you don't want to be everywhere and then find yourself nowhere all of a sudden," he told the Diary.