Beyonce Knowles BeyonceTRL200.jpg Beyonce will be the last live performer on MTV's 'Total Request Live.'

The "Irreplaceable" singer says she's doing it as a tribute to the show that has played such an important role in her career.

"I can remember being 16 or 17 when they asked us to be on the show, and it was our big moment," the former Destiny's Child singer said on the show Tuesday.

The big 'TRL' finale is still more than a month away and Beyonce says she isn't sure what song she'll be singing. The special 2-hour finale of 'TRL' airs November 16th.