Sponge(i prefer this method). Fingertips and brush can leave it streaky but with the sponge I feel I get better coverage and I don't have all the mess on my hands
use a make up sponge first to put the majority on then use use fingers to blend it in it looks alot more natural when you do it this way because you can get in all the gaps eg round your nose and it blends into your hairline easier too!
fingers.. but u do break out ALOT more.. use a sponge! but u should reallllllly switch to powder foundation liquid clogs your pores so bad and makes girls look icky ..pwoders in liquids out