Sons of Serendip are a male singing group who competed on AGT a couple of seasons ago. The lead singer has a beautiful voice, and the others play beautifully, the cello in particular. I noticed Hayley started following them not too long ago. I hadn't paid much attention to them since their time on the show. But I do remember I enjoyed their performances. Today I happened to see that they are performing near Seattle in the near future. I'm not sure if I would be able to make it, but it got me listening to some of their music. Occasionally I think his voice could use more feeling, or more gusto or power, but overall, he does put feeling, and his voice is just so nice that it isn't a big deal (I seem to recall Hayley used to be accused of lack of emotion, yet she still sold plenty of albums ).
Here is their very beautiful rendition of Hallelujah... though I highly recommend the recorded version. It's absolutely stunning!!
Here's an original song that's on their recent Christmas album; it is also a very beautiful song (not too Christmasy, don't worry).
Also, here's a great compilation video of a few of the songs they sang on AGT.. the visual quality is not great, but the audio is good. The clips are likely the full performances, which are short, so it's not really clips at all. The songs are Wicked Game, I Can't Make You Love Me, and Somewhere Only We Know. The second song normall bores me, but his