Gwen Stefani & Lady Gaga Strike Up Friendship On Twitter

Gwen Stefani and Lady Gaga are official BFF’s after striking up a friendship via Twitter.

The 'Poker Face' singer showed her support to Stefani, encouraging her 27 million Twitter followers to check out her new No Doubt single 'Settle Down.'

"nodoubt single 'Settle Down' is out. I just bought it! Go get it its (sic) so good! Band formed the year i was born! 1986 baby," GaGa wrote on Twitter.

To which the 'No Doubt' hitmaker responded graciously: "Wow gaga muffin thanks for the shout out that's big! Kiss from one Stefani to another!"

Before Lady Gaga returned the sentiment with: "I love watching you guys light up the charts. I'm feeling nostalgic today because of this."

The two feisty chicks both have an outrageous fashion sense and a wacky stage presence, so somehow we think this new union was always in the making.  I'm Big Blac This is Your BHR HollyWood Reports