There are actually 4 extra lives possible to collect in B-Doing Woods. One is found in a crate somewhere on the second tree. One is on top of a tree by the mile of blue B-Doings. The third one can be earned by the very easy to get 25,000 points. Now, there's one near the beginning of the level that is kind of hidden. It's at the top between the 5th and 6th blue B-Doings. If you can find it, let me know.