Article continues below advertisementNo, it's not an "Illusion" - Dua Lipa just posted on Instagram in her bra.The singer, 30, bared her cleavage in a triangle-shaped black top as she applied a tube of YSL lipstick.The sultry snap was included in a photo dump from her trip to Warsaw, Poland, shared to social media on Sunday, April 26.Article continues below advertisementTap Here To Add Ok Magazine as A Trusted SourceSource: @dualipa/InstagramDua Lipa enjoyed a busy vacation in Warsaw, Poland.Lipa's tattoos were on full display in the photo, including a small "R" on the inside of her wrist.