The Olympic bronze medallist was the showstopper for designer duo Bidyut & Rakesh's wedding collection at the ongoing ninth Northeast Festival on Guwahati.
The 21-year-old became only the seventh Indian male boxer to secure a medal in the marquee competition.
The debutant advanced to the 54 kg semifinals with a superb win over former Olympic silver-medallist Yoel Finol Rivas of Venezuela.
Fury will likely now look to take on Ukraine's Oleksandr Usyk, who holds the other three titles, for a chance to become the first undisputed heavyweight champion since Lennox Lewis 21 years ago.
Pacquiao, a Philippine senator who has been dividing his time between politics and fighting, made the announcement in a 14-minute video posted on his official FB page.
Usyk seized the WBA, WBO, IBF and IBO belts with the three judges scoring it 117-112, 116-112, 115-113.
The 18-year-old Jeanette Zacarias Zapata died from injuries sustained in a bout with Marie-Pier Houle on Saturday night.
The judges scored the fight 115-113, 116-112, 116-112 in favour of Ugas, who controlled the second half of the contest.
The 21-year-old Nico Ali Walsh defeated Jordan Weeks, a former MMA fighter, in a middle-weight bout by technical knockout.
She lost to Turkish world champion Busenaz Surmeneli 0-5 in the welterweight semifinals.