First one is Ellie Goulding. I love her voice, it's so angelic. Whenever they play this song at work it always puts me in a good mood.
Second video is from MoZella. She really has a unique voice. I always love when you hear someone singing and you paint a picture in your head of who you think it is..and then it's someone completely different. Close your eyes and listen to this song and think about who you see singing it. You'll see what I mean.