Should I buy this album for my ipod?

Allright well I bought the song boom boom pow when it came out as a single but now a while after the whole album is now released should i buy the whole album even tho i allready nought the song (waste of a $1.29 lol) or should i just buy these songs (imma be,i got a feeling, party all the time) those are my favs but is the rest of the album songs worth it thanks =)