DAILY DIRT: Age is just a number, right?

Denzel is 67, Christie is 68, Martha is 81. Where did all the years go? … Welcome to today’s three thoughts that make up Vol. 378 of The Daily Dirt.

1. I’m frequently amazed at how old some celebrities are these days. At times, I think I must have slept through an entire decade — or two. Here are 10 prime examples and a few bonus entries:

• 1. Denzel Washington, 67: He’s been a star for more than 40 years.
• 2. Chris Rock, 57: Despite the advanced years, he proved earlier this year he can still take a punch.
• 3. Christie Brinkley, 68: Her current net worth is a reported $100 million. Apparently, the swimsuit business paid pretty well.
• 4. Mariah Carey, 53: “Love Takes Time” is my favorite Mariah effort. The video was great, too. (Of course, I called it up to play after typing this and noticed it has been played more than 53 million times on YouTube.)
• 5. Keanu Reeves, 57: The Matrix guy was born in Beirut and grew up in Canada.
• 6. Halle Berry, 56: She was once Miss Teen Ohio.
• 7. Martha Stewart, 81: She was born Martha Kostrya.
• 8. Juila Louis-Dreyfus, 60: One of the former gang of four on “Seinfeld,” she owns 11 Emmys.
• 9. Jennifer Lopez, 53: Despite being the music business for more than 20 years, J-Lo has only toured twice. So she has more engagement rings than concert tours.
• 10. Vanna White, 65: She has been spinning those letters on “Wheel of Fortune” since 1982.

Other notables

• Drew Barrymore, 47: She’s been acting since she was 11. Her first “role” was in a Puppy Chow commercial.
• Samuel L. Jackson, 73: He studied to be a marine biologist at Morehouse College.
• Sandra Bullock, 58: Strange but true — Bullock has not appeared on network TV in more than a decade.
• Michelle Pfeiffer, 64: One of my all-time favorite actresses.
• Ellen DeGeneres, 64: Remember when she was a judge on “American Idol” — for one season? She replaced Paula Abdul, supposedly for five years, but exited after the first season.
• Cher, 76: Her real name is Cherilyn Sarkisian.
• Britney Spears, 41: In some regards, it seems like she should be 141.

2. This week, we’re wishing happy birthday to the following:

• Actor Paul Reubens turns 70 on Saturday. You may know him better as Pee Wee Herman.
• Singer Shania Twain will be 62 on Saturday. One of my life’s regrets is never seeing her in concert.
• The late, great Michael Jackson would have been 64 on Saturday.
• Singer Van Morrison will be 77 on Wednesday. Can we all sing “Brown-Eyed Girl” together?
• If alive today, MLB Hall of Famer Frank Robinson would have been 87 on Wednesday. I was fortunate enough to interview Robinson shortly after he was named manager of the Cleveland Indians, becoming the first Black manager in MLB history. “Robby” was the consummate gentleman — and hitter.

3. Today’s little-known fact from pop music history:

Call this two-for-one day. First , the artists with the most consecutive No. 1 hits on the Billboard Hot 100:

• Whitney Houston, 7 (1985-88).
• The Beatles, 6 (1964-66).
• Bee Gees, 6 (1977-79).

Secondly, the most hits to reach No. 2 (but never made it No. 1):

• Elvis Presley, 6.
• Madonna, 6.
• Taylor Swift, 6.
• Carpenters, 5.
• Creedence Clearwater Revival, 5.

Steve Thought O’ The Day — Neck tattoos seem like they would be incredibly painful. Literally, a pain in the neck.