Ireland are celebrating one other Six Nations title win with a 17-13 victory over Scotland in Dublin.
It is their fifth title in 11 years, having endured a drought of greater than 20 years between 1985 and 2009.
Dan Sheehan and Andrew Porter scored tries for the hosts in Dublin, who've now gained back-to-back championships.
Player of the Match, Ireland's Jamison Gibson-Park, known as the win "incredible".
"We needed to keep within the battle. It was two good groups going at it and we have been going for a championship.
"Our backs were against the wall a little bit [after last week's defeat to England] so I am unbelievably proud of the boys."
After England denied them a bid for successive Grand Slams final week, Ireland appeared liable to relinquishing their grip on the title and giving the English one thing to play for in Paris after eking out an unconvincing 7-6 halftime lead.
But the victory stored Ireland too far forward of second-placed England, who play France within the last sport of the championship afterward Saturday. Scotland completed with two wins and three losses.
Tries from hooker Dan Sheehan and loosehead prop Andrew Porter, added to by seven factors by way of the boot of Jack Crowley noticed Ireland to victory, with Finn Russell notching two penalties in response for Scotland, and Huw Jones a late attempt.
Ireland captain Peter O'Mahony mentioned it may have been his final match for his nation - but when so, "it wasn't a bad one to go out on".
He advised Sky Sports News the group "showed a lot of grit and also ambition with the ball in a damp and greasy environment"
"I thought we played some good rugby. We talked about getting stuck in and probably put a lot of lead in their legs."
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