John Travolta knows the time and place to put on his hair ... literally!

The 57-year-old actor hosted a showcase of Bombardier's private jets on Tuesday at the Burbank Airport sporting a thick head of hair.

However, on Monday, Travolta enjoyed a relaxing day playing tennis with a buddy in Calabasas ... sporting a serious lack of follicles.

Hair today, gone tomorrow.

John Travolta has been busy filming the stoner flick Savages opposite the gorgeous Blake Lively ... so we understand the A-list actor needs a break.

Travolta, who's going without a hair piece for his current role, hit the courts with a friend in Calabasas for a relaxing game of tennis. Gotta stay hydrated!

The 57-year-old actor is probably still wondering who ripped off his vintage Mercedes over the weekend. The Mercedes-Benz 280SL, worth at least $100,000, is still missing ... and Santa Monica P.D. tells us there are still no leads.

At least you got tennis, John ... to work off that stress and those pounds!

John Travolta's pricey vintage ride was ripped off over the weekend in Santa Monica.

The actor, who had stopped to check out cars at a Jaguar dealership, parked his 1970 Mercedes-Benz 280SL on the street ... and when he returned 10 minutes later, the car worth six-figures, was gone!

Santa Monica P.D. confirmed to X17online that the Mercedes is registered to Travolta. As for right now, police tell us there are no leads in the case.

Travolta's rep has yet to comment on the incident.

John Travolta took a break to feed his munchies on the Dana Point set of the upcoming stoner flick, Savages, on Friday.

The actor sported a newly-shaved head as he relaxed with a burger and fires during a break from filming the Laguna Beach-set crime drama, in which he plays a burned-out DEA agent.

The film, directed by Oliver Stone, will hit theaters in September 2012.

X17 caught up with John Travolta on the set of the new star-studded flick Savages!

Travolta is filming in California -- we also captured his co-star Blake Lively on set.

Can't wait to see this movie! It's Travolta doing what he does best -- being a gangster!

Baby Benjamin is getting so big!

John Travolta took his family to Paris to celebrate Father's Day, and the actor was especially excited for his holiday this year.

"Honestly, if I get to spend the day with the kids in the pool, or something fun like that, it would be a great Father's Day for me", the actor told Extra on his plans for the day.

Father's Day is even more close to the actor's heart, considering he and wife Kelly Preston lost their 16-year-old son Jett in 2009. The couple have often expressed new baby Ben is a "healing baby", and this is John's first Dad's Day with the little guy!

Travolta is gearing up to star in the untitled Gotti movie, costarring Al Pacino, Joe Pesci, Kelly Preston, and Lindsay Lohan! The film is due in theaters next year.

Happy Father's Day John!

John Travolta and family took baby Benjamin out for dinner at Katsuya in Brentwood Sunday night, and Ben has gotten so big! We so rarely see him out in public!

Baby Ben was born November 24 of last year. John, Kelly and daughter Ella Bleu all grabbed dinner, and proud papa John was all smiles as he carried Ben out of the restaurant.

See all the pics of the happy family in our gallery below!

John Travolta grabbed dinner with Hollywood exec Dick Cook Thursday and revealed his Mother's Day gift to wife Kelly Preston!

Watch the video to see what it is, and mum's the word, everyone - literally!

Kelly became a mom again in November of last year when baby Benjamin was born. John says Ben is "doing great."

John, Kelly and Ella Bleu will all star in the upcoming film Gotti: Three Generations, as members of the Gotti clan. John says making the movie with his wife and daughter is "awesome."

See what John is doing to prepare for the role after the jump!