There is a cool gift with purchase promotion when you buy the LEGO Creator Expert Ford Mustang (10265).
The LEGO Brand Store in Shanghai is gifting a Ford Mustang keychain whenever you purchase a LEGO Ford Mustang starting March 1st.
As this is a promotion of the official LEGO Brand Store in Shanghai it should roll out to the other brand stores in the other regions in due time.
Do note that this is all while stocks lasts so grab it if you can.
(Thanks to Wooden Duck for the heads up!)