Lakers baller Kareem Rush singing Sam Smith ‘s “Stay With Me” — and dude can definitely hit the high note! As we previously reported, Rush is laser focused on growing his music career — something he’s been passionate about for years. In fact, Rush dropped a single back in 2010. Now, with a new album on the way … Rush put his pipes on display on “TMZ Hollywood Sports” — busting out a ridiculously tough song with no warm-up, no backing track and only basement level acoustics.