Westlife were one of my all time faves. I think I saw all but two of their tours over the years they were together and I'm not ashamed to admit it!
My first every concert was in Plymouth and my Mum and I went to see Craig David! That was fun, he was huge then and my Mum loved him. I also saw Darren Hayes (of Savage Garden) and he was awesome, Will Young and Mika too! I took my Sister to see Girls Aloud in Birmingham once too, that was her first concert and it was so fun.
One place I've never seen a gig is at the o2 in London and I want to change that. I have concert DVDs of shows there and it looks absolutely massive and atmospheric. I saw there is going to be a Status Quo tour* there and Will.i.am too (I like Will, the BF likes Quo!). I think top of my list are Michael Buble and Lady Gaga! I'd love to see both of those.
What's the best gig you've ever been to? Mine was Robbie Williams with my Mum at an outdoor gig in Leeds. It was epicly amazing and I adore him! He knows how to entertain. :)