For everyday, I rarely apply a lip liner. But for shoots or going out at night I like using lip liners to bump up the lip colour and for more definition. One of my biggest beauty peeves is seeing dark liner paired with a lighter lipstick!! Eeek! Always try to match the lip liner with the lipstick or wear a neutral colour. And blend!! My favourite liners to use are from M.A.C. and Three Custom Color Specialists! What's your favourite?