Willie Nelson recently performed at this year's Luck Reunion festival.

This marked the country star's first show after his older sister, Bobbie died.

This was also the first time the 88-year-old entertainer performed without his sibling.

The late pianist and her brother were part of a band called, The Family.

The siblings spent nearly 50 years performing together before Bobbie's death.

Willie honored his sister's memory during his Luck festival's performance.

The Grammy announced Bobbie's with an emotional Instagram post.

Bobbie died on March 10, at the age of 91.

The Nelson siblings developed their musical gifts while being raised in Texas.