I just got an iTunes gift card & I am not sure what to get. What songs or album would you get?

It is hard for me to pick something because I have 221 songs on my iPod shuffle(can only buy songs or albums). I want to buy the new Backstreet Boys cd, but I am not sure when it comes out. Instead I got their new single. I really like pop, Contemporary Christian, world, easy listening(adult pop), clical, and soundtracks. Some other categories I kind of like are country, clic rock(60s & 70s), and oldies(50s & 60s). I cannot stand rap, heavy metal or grunge.