Lady Gaga Goes Monroe to Meet Chelsea Clinton

Lady Gaga busted out her best Marilyn to serenade 65-year old birthday boy President Clinton with “Bill Romance” (a Bubba-friendly version of the racy hit tune) during the “A Decade of Difference” concert at the Hollywood Bowl in LA on Saturday -- then she headed backstage to bump elbows with the rest of A-list, including former First Daughter Chelsea Clinton.

What do two fierce females like this chit-chat about? Maybe vegan Chels chided Gagz for that meaty fashion mistake?

Or, since the entire all-star lineup -- including Stevie Wonder, Bono and The Edge -- were also there to sing the praises of The Clinton Foundation’s amazing work over the last 10 years, it’s might be a good guess that the progressive pop star was bouncing whacky non-profit ideas off the next generation of this great American family.