The phrase "be celebrate" seems to be a combination of two separate words or concepts - "be" and "celebrate".
"Be" is a verb form of the word "be", which comes from the Old English word "bēon" or "bēo", meaning "to exist" or "to be". The word "be" has remained relatively unchanged throughout the centuries in English and is used to indicate existence, identity, or occurrence.
"Celebrate" comes from the Latin verb "celebrare", which means "to assemble or honor". It is derived from the word "celeber", which means "famous" or "crowded". Over time, "celebrate" has acquired the meaning of commemorating an event, achievement, or occasion with festivities, joy, or public acknowledgment.