Jimmy Kimmel started his month-long 'Mash Up Mondays' series in style last night, inviting Weezer to join ZZ Top for a performance as the mashed-up Wee-Z Top.

You can watch the groups' collaboration on ZZ Top's 'Sharp Dressed Man' at the 'Jimmy Kimmel Live' website if you have an account with an accepted cable provider; if not, you'll have to wait until next week, when clips from the Feb. 2 episode make their way to the all-access section of the site.

The Wee-Z Top number is scheduled to be followed by similarly surprising mash-ups every Monday this month. On Feb. 9, Morris Day joins up with Haim; on Feb. 16, Aloe Blacc will perform with Blackstreet. Kimmel's Feb. 23 performers are still being kept under wraps for now.

While we wait for Wee-Z Top's debut to hit YouTube, we can at least content ourselves with a few clips from ZZ Top's last appearance on 'Kimmel Live,' which took place in late January. Check out their performances of 'La Grange' and 'Tush' below.

ZZ Top Perform 'La Grange'

ZZ Top Perform 'Tush'

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