The Saturdays sign off in Dublin as Una gets engaged
The Saturdays round off their current tour in Dublin on Monday night in what looks likely to be one of the girl band's final appearances before Una Healy takes maternity leave.
The 30-year-old's baby bump was hard to miss on Friday night as the fivesome took to the stage at London's Wembley Arena for the first time.
Healy was moved to tears as Rochelle Wiseman announced Una's rugby player boyfriend Ben Foden had proposed.
Frankie Sandford, meanwhile, could hardly restrain her excitement as she and her fellow Sats greeted the crowd with "Hello Wembley".
The Saturdays have yet to score a UK number one, despite coming close in 2009 with Forever is Over and Comic Relief single Just Can't Get Enough.
But that didn't stop an enthusiastic crowd from joining in as they performed tracks like Ego, Work, Up and Higher.
Descending in a cage elevator and sporting business suits and secretary spectacles, the girls opened their set with 2011's Notorious.
Later on they revisited their 2008 debut single If This is Love, which was mashed up with Maroon 5's Move Like Jagger.
Una Healy's pregnancy didn't stop her taking part, although the Irish singer did take a break during one of the more energetic dance routines.
"This is the point in the show where I go off for a cup of tea and a chocolate biscuit," she joked as the remaining four danced with their backing dancers on Do What You Want With Me.
Fake snow and fur-trimmed Santa outfits brought some festive colour later in the set as the girls performed Christmas classic Winter Wonderland.
With X Factor victors Little Mix topping the singles chart this weekend with Cannonball, the Saturdays may soon face competition in the UK girl band stakes.