I'm also stuck on Step 2.  I've tried:

SELECT artist FROM songs WHERE artist IN (SELECT name FROM artists WHERE genre = "Pop");

Previously I tried:

SELECT title FROM songs WHERE artist IN (SELECT name FROM artists WHERE genre = "Pop");

Basically, I'm just stuck here and can't move on. The system isn't giving me any feedback (e.g., good job, syntax error, or anything).

Notice that the name of the artist and the genre are both contained in the artist table, so that's the only table you need to refer to.

You want to get the name of all the artists (hint: from the artists table) where the genre is Pop.