By Breaking Celebrity News Staff

Real Housewives Of Beverly Hills star Taylor Armstrong had one heck of a 40th birthday bash.

Sources exclusively tell Breaking Celebrity News that her late husband Russell Armstrong pulled out all the stops for her 40th a few weeks ago, leaving no expense overlooked and dropping more than $60,000 for a special party at Beachers Madhouse at the Roosevelt Hotel in Hollywood.

"It was a very intimate party with a select group of people," an insider reveals. "On the surface both Taylor and Russell looked happy and were all smiles. He was very attentive to her, maybe even more than usual and I found that to be a bit odd. He followed her around and was by her side the entire time.

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"It was also very strange Russell was throwing money around like water given their known financial troubles. He spent thousands on expensive tables with bottle service and at the end of the night he turned heads when he presented Taylor with an amazing diamond tennis bracelet! It was a very grand and expensive gesture."

The source tells Breaking Celebrity News that Russell was in charge of the guest list and only extended invitations to co-stars Kyle Richards (who was out of town) and L