It's been more than 16 years since it came out, but Justin Bieber and Ludacris still got "Baby" fever ... with the pop ...

"Make some noise for my brother Justin Bieber," the rapper told a screaming crowd as the Canadian star climbed onto the stage ...

Move over Gaga – Justin Bieber’s “Baby” is now the most-watched video on YouTube. The 16-year-old pop phenom’s vid featuring Ludacris topped Lady Gaga’s “Bad Romance” Friday with more than 246 million ...

Justin Bieber surprised fans by joining Ludacris onstage at a pre-Super Bowl party Feb. 7 after the rapper delivered a solo rendition of their 2010 single "Baby." ...