It won't be evening dress, tiara and jewels, but it's likely to be evening wear.
From the mirror.co.uk
The boat cloak, tiara, and cape, all being optional items, are very rarely seen.
From the en.wikipedia.org
Some headgear, such as the crown, coronet, and tiara, have evolved into jewelry.
From the en.wikipedia.org
The bracelets and tiara, that are obviously supposed to be metal, look plastic.
From the latimes.com
Amid standing ovations from the crowd, Herrick received a tiara, sash and trophy.
From the newsobserver.com
Want to see the 78-carat diamond tiara Madonna wore when she married Guy Ritchie?
From the dailyherald.com
One of the most exciting moments is when a tiara is placed on the woman's head.
From the charlotteobserver.com
Her chest-plate, belt and tiara were also changed from gold to sterling silver.
From the en.wikipedia.org
The headdress worn by the Immortals is believed to have been the Persian tiara.
From the en.wikipedia.org
More examples
A jeweled headdress worn by women on formal occasions
A tiara (from Latin: tiara, from Ancientu00A0Greek: u03C4u03B9u03ACu03C1u03B1) is a jeweled, ornamental crown worn by women. It is worn during formal occasions, particularly if the dress code is white tie.
Tactical Intelligence and Related Activities (TIARA) is found in every branch of the United States Armed Forces (Army, Navy, Air Force). It coordinates all the intelligence collection at the tactical level to support operational military commanders, but it is not a program. ...
The papal crown; An ornamental coronet
Ornamental crown of pearls, crystals, rhinestones, or lace worn on top of the head.
One of the headpiece options for the bride, a tiara is a thin jeweled semi-circular coronet with a higher front and sloping sides worn at the top of the head. Or if it is regular in height, then it may be worn at an angle.
The special headdress of the pope, consisting of a pointed hat encircled by three crowns
The triple crown worn by the popes of Rome.
What all the senshi possess on their foreheads. Initially, Sailormoon uses this as her main attack in both the anime and the manga. In the manga, she receives several types of tiara in the first story arc that vary in their uses.