YouTube has come to define the era of online video, so let’s take a look at their most popular videos of all time.Our latest update shows that Justin Bieber is still the only video over the 300 million views mark, after knocking Lady Gaga off the top spot in August. Bieber is adding over 1 million views every day! New to the top 10 this month is the video for Eminem’s ‘Love The Way You Lie,’ featuring Rihanna. Here is the top 10, as of October 2010:

1 ) Justin Bieber – Baby ft. Ludacris; 344,194,152 views
2 ) Lady Gaga – Bad Romance; 287,254,587 views
3 ) Charlie bit my finger – again !; 234,951,237 views
4 ) Shakira – Waka Waka(This Time for Africa); 202,317,896 views
5 ) Miley Cyrus – Party In The U.S.A. – Official Music Video; 161,423,252 views
6 ) Evolution of Dance; 153,302,372 views
7 ) Pitbull – I Know You Want Me (Calle Ocho); 145,563,357 views
8 ) Hahaha – Small daring boy; 139,726,890 views
9 ) Eminem – Love The Way You Lie ft. Rihanna; 137,820,758 views
10) Miley Cyrus – 7 Things – Official Music Video (HQ);  133,377,331 views